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Share the gift of healthy, luscious hair this festive season

<p dir="ltr">With the festive season approaching, there’s nothing worse than dull and lifeless hair, especially when we’re going to Christmas parties and taking photos with loved ones. </p> <p dir="ltr">So whether you’re looking for a treat for yourself, or a special gift for someone in your life, give the gift of gorgeous hair with Wella Professionals stunning Christmas range. </p> <p dir="ltr">With gift packs for every hair concern, there is something for everyone in Wella’s gifting range, whether your hair is coloured or damaged, or if you’re looking for an injection of moisture or shine.</p> <blockquote class="instagram-media" style="background: #FFF; border: 0; border-radius: 3px; box-shadow: 0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width: 540px; min-width: 326px; padding: 0; width: calc(100% - 2px);" data-instgrm-permalink="https://www.instagram.com/reel/DBznE8TuYIt/?utm_source=ig_embed&utm_campaign=loading" data-instgrm-version="14"> <div style="padding: 16px;"> <div style="display: flex; flex-direction: row; align-items: center;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 40px; margin-right: 14px; width: 40px;"> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 100px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 60px;"> </div> </div> </div> <div style="padding: 19% 0;"> </div> <div style="display: block; height: 50px; margin: 0 auto 12px; width: 50px;"> </div> <div style="padding-top: 8px;"> <div style="color: #3897f0; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: 550; line-height: 18px;">View this post on Instagram</div> </div> <div style="padding: 12.5% 0;"> </div> <div style="display: flex; flex-direction: row; margin-bottom: 14px; align-items: center;"> <div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(0px) translateY(7px);"> </div> <div style="background-color: #f4f4f4; height: 12.5px; transform: rotate(-45deg) translateX(3px) translateY(1px); width: 12.5px; flex-grow: 0; margin-right: 14px; margin-left: 2px;"> </div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(9px) translateY(-18px);"> </div> </div> <div style="margin-left: 8px;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 20px; width: 20px;"> </div> <div style="width: 0; height: 0; border-top: 2px solid transparent; border-left: 6px solid #f4f4f4; border-bottom: 2px solid transparent; transform: translateX(16px) translateY(-4px) rotate(30deg);"> </div> </div> <div style="margin-left: auto;"> <div style="width: 0px; border-top: 8px solid #F4F4F4; border-right: 8px solid transparent; transform: translateY(16px);"> </div> <div style="background-color: #f4f4f4; flex-grow: 0; height: 12px; width: 16px; transform: translateY(-4px);"> </div> <div style="width: 0; height: 0; border-top: 8px solid #F4F4F4; border-left: 8px solid transparent; transform: translateY(-4px) translateX(8px);"> </div> </div> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center; margin-bottom: 24px;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 224px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 144px;"> </div> </div> <p style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; line-height: 17px; margin-bottom: 0; margin-top: 8px; overflow: hidden; padding: 8px 0 7px; text-align: center; text-overflow: ellipsis; white-space: nowrap;"><a style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: normal; line-height: 17px; text-decoration: none;" href="https://www.instagram.com/reel/DBznE8TuYIt/?utm_source=ig_embed&utm_campaign=loading" target="_blank" rel="noopener">A post shared by Wella Professionals ANZ (@wellapro_anz)</a></p> </div> </blockquote> <p dir="ltr">Ranging from the Wella Professionals Fusion Travel Trio for just $48.95, to the Wella Professionals Ultimate Repair Repair Trio for $114.95, the gorgeous gift packs feature a mix of shampoo, conditioner, masks, and shine oils. </p> <p dir="ltr">There are 10 beautiful gift packs on offer, with these Wella Trios having everything you need to get you, or the lucky person you’re buying for, started on their journey to transform their hair.</p> <p dir="ltr"><img src="https://oversixtydev.blob.core.windows.net/media/2024/11/wella-xmas-inset.jpg" alt="" width="1280" height="720" /></p> <p dir="ltr">The complete selection of Wella Professionals gift sets available to purchase at <a href="https://www.sephora.com.au/brands/wella-professionals?srsltid=AfmBOoql21pQ7BfPilCk7yTK4JwxBXCCsVjcOXHZrejK5F6EL0lGfrHj">Sephora</a>, Myer, David Jones, <a href="https://www.adorebeauty.com.au/b/wella-professionals.html">Adore Beauty</a>, Amazon, <a href="https://www.ozhairandbeauty.com/brands/wella-professionals?top=brands&gad_source=1&gbraid=0AAAAADs5kjeHbLVuofBnsO5umpMUOhOdq&gclid=Cj0KCQiA_qG5BhDTARIsAA0UHSK22eIZDejiKd533GEKq8iaYrKphZVZIwRj4d7J4rJ8T7XCudVZNoEaAv3xEALw_wcB">Oz Hair & Beauty</a>, Look Fantastic, The Iconic and selected Wella Salons, as well as Wella’s official <a href="https://au.wella.professionalstore.com/">website</a>. </p> <p dir="ltr"><em>Image credits: Supplied / Shutterstock </em></p>

Beauty & Style

What to claim for lost, delayed or damaged bags on overseas flights

<p><em><a href="https://theconversation.com/profiles/rebecca-johnston-123333">Rebecca Johnston</a>, <a href="https://theconversation.com/institutions/university-of-notre-dame-australia-852">University of Notre Dame Australia</a> and <a href="https://theconversation.com/profiles/david-hodgkinson-6574">David Hodgkinson</a>, <a href="https://theconversation.com/institutions/the-university-of-western-australia-1067">The University of Western Australia</a></em></p> <p>If you get on a plane and your baggage ends up being delayed, damaged or lost, who’s responsible: you or the airline? And what rules apply when you’re flying between different countries – even if you don’t have travel insurance?</p> <p>Airlines (otherwise known as carriers) generally include baggage requirements in their terms and conditions of carriage, which are set out or referred to on your ticket. These are the rules that apply to the journey that you have booked.</p> <p>But for international flights, a carrier’s liability for damage, loss or delay of baggage is governed by a number of overarching international treaties, which many passengers aren’t aware of.</p> <h2>International agreements</h2> <p>The <a href="http://www.jus.uio.no/lm/air.carriage.warsaw.convention.1929/doc.html">Warsaw Convention</a> of 1929 was the first of these treaties, and the latest is the passenger-friendly 1999 <a href="http://www.jus.uio.no/lm/air.carriage.unification.convention.montreal.1999/">Montreal Convention</a>.</p> <p>In order for one of these treaties to apply to a particular journey, the same treaty must be in place at the point of departure and the passenger’s final destination.</p> <p>For many trips, the agreement that will apply will be the Montreal Convention, which has to date <a href="http://www.icao.int/secretariat/legal/List%20of%20Parties/Mtl99_EN.pdf">108 state parties</a>, covering everywhere from Albania and Australia to Zambia. In time, the Montreal Convention is expected to apply to almost all air travel.</p> <p>The Warsaw Convention (as amended by the <a href="http://www.jus.uio.no/lm/air.carriage.warsaw.convention.hague.protocol.1955/doc.html">Hague Protocol</a> and <a href="http://www.jus.uio.no/lm/air.carriage.warsaw.convention.montreal.protocol.4.1975/doc.html">Montreal Protocol No. 4</a>) will generally apply where the Montreal Convention does not. It is less favourable to passengers.</p> <p>All these treaties have similar provisions to deal with baggage claims – but very different limits to what you might get if you need to make a claim.</p> <h2>What the airline is responsible for</h2> <p>A carrier is liable if your checked baggage is lost, delayed or damaged regardless of fault.</p> <p>This is so unless the damage resulted from the inherent defect or quality of the baggage or, in terms of delay, if it proves that it took all reasonable measures to avoid the damage occasioned by that delay.</p> <p>As for unchecked baggage (that is, carry-on baggage), the carrier is only liable if the damage is due to the fault of the carrier or its agents.</p> <p>Unless otherwise specified, reference to “baggage” includes both checked and unchecked baggage.</p> <h2>Calculating baggage compensation</h2> <p>Under the Warsaw Convention (as amended by the <a href="http://www.jus.uio.no/lm/air.carriage.warsaw.convention.hague.protocol.1955/doc.html">Hague Protocol</a> and <a href="http://www.jus.uio.no/lm/air.carriage.warsaw.convention.montreal.protocol.4.1975/doc.html">Montreal Protocol No. 4</a>) and the Montreal Convention, liability limits are expressed in <a href="http://www.imf.org/external/np/exr/facts/sdr.HTM">special drawing rights</a> (SDRs).</p> <p>An SDR is a type of foreign exchange reserve asset created by the International Monetary Fund. Its value is based on an artificial basket of currencies consisting of the US dollar, the euro, the pound and the Japanese yen. The liability limits are reviewed every five years.</p> <p>As of October 16, 2014, the <a href="http://www.imf.org/external/np/fin/data/param_rms_mth.aspx">value of an SDR</a> is about US$1.49, £0.93 or A$1.70. Current SDR values for other currencies are also listed <a href="http://www.imf.org/external/np/fin/data/param_rms_mth.aspx">here</a>.</p> <h2>So what is your baggage worth?</h2> <p>In terms of baggage liability limits, the Warsaw Convention is of relatively little assistance to passengers.</p> <p>If your international travel is subject to Warsaw (for example, if you flew out of the United States on a one way ticket to Guatemala), liability for delayed, damaged or lost baggage is limited to 17 SDRs (about US$25.33, £15.81 or A$28.90) per kilogram per passenger for checked baggage and 332 SDRs (about US$494.68, £308.76 or A$564.40) per passenger for unchecked baggage.</p> <p>In contrast, a carrier is liable to pay far greater damages if the Montreal Convention applies.</p> <p>For any travel covered by Montreal, the carrier’s liability for baggage is limited to 1131 SDRs per passenger (US$1685.19, £1051.83 or A$1922.70), unless otherwise declared.</p> <p>The carrier is not liable for damages caused by delay if the carrier took all reasonable measures, or if it was impossible for it to take such measures.</p> <h2>Time limits on baggage claims</h2> <p>Time limits are imposed on making a claim for delayed, damaged or lost baggage. Any potential claims should be made to a carrier in writing within these specified limits.</p> <p>Article 26 of Warsaw provides that any complaint as to delay of baggage must be made at the latest within 21 days from the date the baggage was placed at the passenger’s disposal.</p> <figure class="align-right zoomable"></figure> <p>Similarly, under Article 31 of Montreal, a complaint must be made within 21 days of a passenger receiving their baggage.</p> <p>With respect to damaged baggage, under Warsaw, any claim must be made “forthwith” after the discovery of the damage and at most seven days from the date of receipt of the baggage. Montreal also gives passengers seven days from receipt of checked bags to report a damage claim.</p> <p>Neither convention imposes a time limit for reporting lost baggage claims. But it is advisable that you make your complaint as soon as possible.</p> <p>Warsaw does not state when baggage is considered “lost”, leaving it up to carriers to make that ruling. Under Montreal, baggage is only considered lost after 21 days or if the carrier admits that they have lost it.</p> <p>If a passenger fails to make a complaint within the specified times, the carrier will not be liable unless there has been fraud on the carrier’s part.</p> <h2>Insurance alternatives</h2> <p>If you are concerned that the contents of your baggage exceed the liability limits outlined above, you can make a special declaration of the value of your baggage prior to check-in and pay any additional fee (if required).</p> <p>In this case, the carrier will be liable to pay a higher amount, unless it is proved that the declared amount is greater than the actual value of your baggage.</p> <p>Alternatively, prior to travelling, check with your insurance company as to whether your travel insurance covers any excess from delayed, damaged or lost baggage.</p> <p>You might also want to <a href="http://www.icao.int/secretariat/legal/List%20of%20Parties/Mtl99_EN.pdf">check this list</a> to see whether the places you’re departing from and finally arriving at are parties to the Montreal Convention. If not, you might just find yourself out of pocket.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/32111/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/rebecca-johnston-123333">Rebecca Johnston</a>, Adjunct Lecturer, Law School, <a href="https://theconversation.com/institutions/university-of-notre-dame-australia-852">University of Notre Dame Australia</a> and <a href="https://theconversation.com/profiles/david-hodgkinson-6574">David Hodgkinson</a>, Associate Professor, Law School, <a href="https://theconversation.com/institutions/the-university-of-western-australia-1067">The University of Western Australia</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/what-to-claim-for-lost-delayed-or-damaged-bags-on-overseas-flights-32111">original article</a>.</em></p>

Travel Trouble

How do heat protectants for hair work? A chemistry expert explains

<p><em><a href="https://theconversation.com/profiles/daniel-eldridge-1494633">Daniel Eldridge</a>, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p>Heat can do amazing things to change your hairstyle. Whether you’re using a curling wand to get ringlets, a flat iron to straighten or a hair dryer to style, it’s primarily the heat from these tools that delivers results.</p> <p>This comes with casualties. While your hair is surprisingly tolerant to heat compared with many other parts of your body, it can still only withstand so much. Heat treatment hair appliances frequently operate at over 150°C, with some reportedly <a href="https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2019.00298/full#B13">reaching</a> <a href="https://www.researchgate.net/publication/289291195_Thermal_degradation_of_hair_I_Effect_of_curling_irons">over 200°C</a>. At these temperatures, your hair can end up fried.</p> <p>Many people use heat protectants, often in the form of sprays, to minimise the damage. So how do these protectants work? To answer that, I first have to explain exactly what heat does to your tresses on the molecular level.</p> <h2>What heat does to your hair</h2> <p>A large proportion of your hair is made up of proteins. There are attractive forces between these proteins, known as hydrogen bonds. These bonds play a big role in dictating the shape of your locks.</p> <p>When you heat up your hair, the total attraction of these hydrogen bonds become weaker, allowing you to more easily re-shape your hair. Then, when it cools back down, these attractions between the proteins are re-established, helping your hair hold its new look until the proteins rediscover their normal structure.</p> <p>The cuticle – the outermost protective layer of your hair – contains overlapping layers of cells that lose integrity when they’re heated, damaging this outer protective layer.</p> <p>Inside that outer layer is the cortex, which is rich in a protein called keratin.</p> <p>Many proteins don’t <a href="https://pubmed.ncbi.nlm.nih.gov/21635854/">hold up structurally</a> after intense heating. Think of cooking an egg – the change you see is a result of the heat altering the proteins in that egg, unravelling them into different shapes and sizes.</p> <p>It’s a <a href="https://library.scconline.org/v049n04/33">similar story</a> when it comes to heating your hair. The proteins in your hair are also susceptible to heat damage, reducing the overall strength and integrity of the hair.</p> <p>Heat can also affect substances called melanin and <a href="https://pubmed.ncbi.nlm.nih.gov/21443842/">tryptophan</a> in your hair, resulting in a change in pigmentation. Heat-damaged hair is <a href="https://pubmed.ncbi.nlm.nih.gov/21635854/">harder to brush</a>.</p> <p>The damage is even more devastating if you use heat styling tools such as <a href="https://labmuffin.com/why-you-should-never-straighten-or-curl-wet-hair/">curling irons or straighteners</a> to <a href="https://library.scconline.org/v062n01/23">heat wet hair</a>, as at the high treatment temperatures, the water soaked up by the fibres can violently evaporate.</p> <p>The result of this is succinctly described by science educator and cosmetic chemist Michelle Wong, also known as <a href="https://labmuffin.com/how-do-heat-protectant-hair-products-work/">Lab Muffin</a>. She notes if you heat wet hair this way, “steam will blast through your hair’s structure”.</p> <p>This steam bubbling or bursting through the hair can <a href="https://pubmed.ncbi.nlm.nih.gov/21443842/">cause substantial damage</a>.</p> <p>It’s worth noting hair dryers don’t concentrate heat in the same way as styling tools such as flat irons or curling wands, but you still need to move the hair dryer around constantly to avoid heat building up in one spot and causing damage.</p> <p>Once heat damage is done, regardless of whether it is severe or mild, the best remaining options are symptom management or a haircut.</p> <p>For all of these reasons, when you’re planning to heat treat your hair, protection is a good idea.</p> <h2>How hair protectants work</h2> <p>When you spray on a hair protectant, many possible key ingredients can go to work.</p> <p>They can have <a href="https://library.scconline.org/v062n01/15">daunting-looking names</a> like polyvinyl pyrrolidone, methacrylates, polyquaterniums, silicones and more.</p> <p>These materials are chosen because they readily stick onto your hair, creating a coating, a bit like this:</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/615002/original/file-20240822-16-beyt90.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=1000&fit=clip"><img src="https://images.theconversation.com/files/615002/original/file-20240822-16-beyt90.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=754&fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/615002/original/file-20240822-16-beyt90.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=600&h=225&fit=crop&dpr=1 600w, https://images.theconversation.com/files/615002/original/file-20240822-16-beyt90.jpg?ixlib=rb-4.1.0&q=30&auto=format&w=600&h=225&fit=crop&dpr=2 1200w, https://images.theconversation.com/files/615002/original/file-20240822-16-beyt90.jpg?ixlib=rb-4.1.0&q=15&auto=format&w=600&h=225&fit=crop&dpr=3 1800w, https://images.theconversation.com/files/615002/original/file-20240822-16-beyt90.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=754&h=283&fit=crop&dpr=1 754w, https://images.theconversation.com/files/615002/original/file-20240822-16-beyt90.jpg?ixlib=rb-4.1.0&q=30&auto=format&w=754&h=283&fit=crop&dpr=2 1508w, https://images.theconversation.com/files/615002/original/file-20240822-16-beyt90.jpg?ixlib=rb-4.1.0&q=15&auto=format&w=754&h=283&fit=crop&dpr=3 2262w" alt="A cartoon of coating attached to a strand of hair." /></a><figcaption><span class="caption">Hair protectant applies a coating to your hair.</span> <span class="attribution">Author provided</span></figcaption></figure> <p>This coating is a protective layer; it’s like putting an oven mitt on your hands before you handle a hot tray from the oven.</p> <p>To demonstrate, I created these by examining hair under a microscope before and after heat protectant was applied:</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/615001/original/file-20240822-16-s2ufqy.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=1000&fit=clip"><img src="https://images.theconversation.com/files/615001/original/file-20240822-16-s2ufqy.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=754&fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/615001/original/file-20240822-16-s2ufqy.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=600&h=293&fit=crop&dpr=1 600w, https://images.theconversation.com/files/615001/original/file-20240822-16-s2ufqy.jpg?ixlib=rb-4.1.0&q=30&auto=format&w=600&h=293&fit=crop&dpr=2 1200w, https://images.theconversation.com/files/615001/original/file-20240822-16-s2ufqy.jpg?ixlib=rb-4.1.0&q=15&auto=format&w=600&h=293&fit=crop&dpr=3 1800w, https://images.theconversation.com/files/615001/original/file-20240822-16-s2ufqy.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=754&h=369&fit=crop&dpr=1 754w, https://images.theconversation.com/files/615001/original/file-20240822-16-s2ufqy.jpg?ixlib=rb-4.1.0&q=30&auto=format&w=754&h=369&fit=crop&dpr=2 1508w, https://images.theconversation.com/files/615001/original/file-20240822-16-s2ufqy.jpg?ixlib=rb-4.1.0&q=15&auto=format&w=754&h=369&fit=crop&dpr=3 2262w" alt="These high magnification images of untreated hair, and hair sprayed with a heat treatment spray, show what a difference it can make." /></a><figcaption><span class="caption">These high magnification images of untreated hair, and hair sprayed with a heat treatment spray, show how the product coats your hair strands.</span> <span class="attribution">Author provided</span></figcaption></figure> <p>Just like an oven mitt, a hair protectant delays the heat penetration, results in less heat getting through, and helps spread out the effect of the heat, a bit like in this image:</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/615003/original/file-20240822-16-tf7xsj.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=1000&fit=clip"><img src="https://images.theconversation.com/files/615003/original/file-20240822-16-tf7xsj.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=754&fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/615003/original/file-20240822-16-tf7xsj.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=600&h=233&fit=crop&dpr=1 600w, https://images.theconversation.com/files/615003/original/file-20240822-16-tf7xsj.jpg?ixlib=rb-4.1.0&q=30&auto=format&w=600&h=233&fit=crop&dpr=2 1200w, https://images.theconversation.com/files/615003/original/file-20240822-16-tf7xsj.jpg?ixlib=rb-4.1.0&q=15&auto=format&w=600&h=233&fit=crop&dpr=3 1800w, https://images.theconversation.com/files/615003/original/file-20240822-16-tf7xsj.jpg?ixlib=rb-4.1.0&q=45&auto=format&w=754&h=293&fit=crop&dpr=1 754w, https://images.theconversation.com/files/615003/original/file-20240822-16-tf7xsj.jpg?ixlib=rb-4.1.0&q=30&auto=format&w=754&h=293&fit=crop&dpr=2 1508w, https://images.theconversation.com/files/615003/original/file-20240822-16-tf7xsj.jpg?ixlib=rb-4.1.0&q=15&auto=format&w=754&h=293&fit=crop&dpr=3 2262w" alt="Cartoon demonstrating the difference between heating unprotected and protected hair" /></a><figcaption><span class="caption">Hair protectant can help spread out the effects of the heat.</span> <span class="attribution">Author provided</span></figcaption></figure> <p><a href="https://library.scconline.org/v049n04/33">This helps</a> prevent moisture loss and damage to both the protective surface cell layer (the cuticle) and the protein structure of the hair cortex.</p> <p>For these barriers to work at their best, these heat-protecting layers need to remain bound to your hair. In other words, they stick on <em>really</em> well.</p> <p>For this reason, continued use can sometimes cause a <a href="https://link.springer.com/article/10.1007/s12221-010-0507-9">buildup</a> which can change the feel and weight of your hair.</p> <p>This buildup is not permanent and can be removed with washing.</p> <p>One final and important note: just like when you use a mitt for the oven, heat does still get through. The only way to prevent heat damage to your hair altogether is to not use heated styling tools.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/233206/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/daniel-eldridge-1494633">Daniel Eldridge</a>, Senior Lecturer in Chemistry, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/how-do-heat-protectants-for-hair-work-a-chemistry-expert-explains-233206">original article</a>.</em></p>

Beauty & Style

Is stress turning my hair grey?

<p><em><a href="https://theconversation.com/profiles/theresa-larkin-952095">Theresa Larkin</a>, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p>When we start to go grey depends a lot on <a href="https://pubmed.ncbi.nlm.nih.gov/36631178/">genetics</a>.</p> <p>Your first grey hairs <a href="https://elifesciences.org/articles/67437">usually appear</a> anywhere between your twenties and fifties. For men, grey hairs <a href="https://pubmed.ncbi.nlm.nih.gov/22077870/">normally</a> start at the temples and sideburns. Women tend to start greying on the hairline, especially at the front.</p> <p>The most <a href="https://pubmed.ncbi.nlm.nih.gov/36631178/">rapid greying</a> usually happens between ages 50 and 60. But does anything we do speed up the process? And is there anything we can do to slow it down?</p> <p>You’ve probably heard that plucking, dyeing and stress can make your hair go grey – and that redheads don’t. Here’s what the science says.</p> <h2>What gives hair its colour?</h2> <p>Each strand of hair is produced by a hair follicle, a tunnel-like opening in your skin. Follicles contain two different kinds of <a href="https://www.sciencedirect.com/science/article/pii/S1534580720301040">stem cells</a>:</p> <ul> <li>keratinocytes, which produce <a href="https://my.clevelandclinic.org/health/body/23204-keratin">keratin</a>, the protein that makes and regenerates hair strands</li> <li>melanocytes, which produce <a href="https://my.clevelandclinic.org/health/body/22615-melanin">melanin</a>, the pigment that colours your hair and skin.</li> </ul> <p>There are <a href="https://www.ncbi.nlm.nih.gov/books/NBK459156/">two main types</a> of melanin that <a href="https://pubmed.ncbi.nlm.nih.gov/36631178/">determine hair colour</a>. Eumelanin is a black-brown pigment and pheomelanin is a red-yellow pigment.</p> <p>The <a href="https://theconversation.com/studying-the-complex-genetics-behind-hair-colour-reveals-how-melanin-affects-us-171088#:%7E:text=Eumelanin%20is%20also%20known%20as%20the%20brown-black%20pigment%2C,is%20due%20to%20low%20amounts%20of%20both%20pigments.">amount of the different pigments</a> determines hair colour. Black and brown hair has mostly eumelanin, red hair has the most pheomelanin, and blonde hair has just a small amount of both.</p> <h2>So what makes our hair turn grey?</h2> <p>As we age, it’s normal for cells to become less active. In the hair follicle, this means stem cells produce less melanin – turning our hair grey – and less keratin, causing hair thinning and loss.</p> <p>As less melanin is produced, there is less pigment to give the hair its colour. Grey hair has very little melanin, while white hair has none left.</p> <p>Unpigmented hair <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290285/">looks grey</a>, white or silver because light reflects off the keratin, which is pale yellow.</p> <p>Grey hair is thicker, coarser and stiffer than hair with pigment. This is because the shape of the hair follicle becomes <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290285/">irregular</a> as the stem cells change with age.</p> <p>Interestingly, grey hair also grows faster than pigmented hair, but it <a href="https://elifesciences.org/articles/67437">uses more energy</a> in the process.</p> <h2>Can stress turn our hair grey?</h2> <p>Yes, stress can <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290285/">cause your hair to turn grey</a>. This happens when <a href="https://faseb.onlinelibrary.wiley.com/doi/epdf/10.1096/fj.05-4039fje">oxidative stress</a> damages hair follicles and stem cells and <a href="https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2022.839859/full">stops them producing</a> melanin.</p> <p>Oxidative stress is an imbalance of too many damaging free radical chemicals and not enough protective antioxidant chemicals in the body. It can be <a href="https://pubmed.ncbi.nlm.nih.gov/36631178/">caused by</a> psychological or emotional stress as well as autoimmune diseases.</p> <p><a href="https://pubmed.ncbi.nlm.nih.gov/22077870/">Environmental factors</a> such as exposure to UV and pollution, as well as smoking and some drugs, can also play a role.</p> <p>Melanocytes are <a href="https://elifesciences.org/articles/67437">more susceptible to damage</a> than keratinocytes because of the complex steps in melanin production. This explains why ageing and stress usually cause hair greying before hair loss.</p> <p>Scientists have been able to link less pigmented sections of a hair strand to <a href="https://elifesciences.org/articles/67437">stressful events in a person’s life</a>. In younger people, whose stems cells still produced melanin, colour returned to the hair after the stressful event passed.</p> <h2>4 popular ideas about grey hair – and what science says</h2> <p><strong>1. Does plucking a grey hair make more grow back in its place?</strong></p> <p>No. When you pluck a hair, you might notice a small bulb at the end that was attached to your scalp. This is the <a href="https://my.clevelandclinic.org/health/body/23435-hair-follicle">root</a>. It grows from the hair follicle.</p> <p>Plucking a hair pulls the root out of the follicle. But the follicle itself is the opening in your skin and can’t be plucked out. Each hair follicle can only grow a single hair.</p> <p>It’s possible frequent plucking could make your hair <a href="https://pubmed.ncbi.nlm.nih.gov/18713071/">grey earlier</a>, if the cells that produce melanin are damaged or exhausted from too much regrowth.</p> <p><strong>2. Can my hair can turn grey overnight?</strong></p> <p>Legend says Marie Antoinette’s hair went <a href="https://www.healthline.com/health/marie-antoinette-syndrome">completely white</a> the night before the French queen faced the guillotine – but this is a myth.</p> <p>Melanin in hair strands is chemically stable, meaning it can’t transform instantly.</p> <p>Acute psychological stress does rapidly deplete melanocyte stem cells <a href="https://www.nature.com/articles/s41586-020-1935-3">in mice</a>. But the effect doesn’t show up immediately. Instead, grey hair becomes visible as the strand grows – at a rate of <a href="https://www.medicalnewstoday.com/articles/326764">about 1 cm per month</a>.</p> <p><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7432488/">Not all hair</a> is in the growing phase at any one time, meaning it can’t all go grey at the same time.</p> <p><strong>3. Will dyeing make my hair go grey faster?</strong></p> <p>This <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9953601/">depends on the dye</a>.</p> <p>Temporary and semi-permanent dyes should not cause early greying because they just coat the hair strand without changing its structure. But permanent products cause a chemical reaction with the hair, using an oxidising agent such as hydrogen peroxide.</p> <p>Accumulation of hydrogen peroxide and <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10232955/">other hair dye chemicals</a> in the hair follicle <a href="https://pubmed.ncbi.nlm.nih.gov/36631178/">can damage</a> melanocytes and keratinocytes, which can cause greying and hair loss.</p> <p><strong>4. Is it true redheads don’t go grey?</strong></p> <p>People with red hair also lose melanin as they age, but differently to those with black or brown hair.</p> <p>This is because the red-yellow and black-brown pigments are chemically different.</p> <p>Producing the brown-black pigment eumelanin is more complex and <a href="https://onlinelibrary.wiley.com/doi/full/10.1034/j.1600-0749.2002.02017.x">takes more energy</a>, making it more susceptible to damage.</p> <p>Producing the red-yellow pigment (pheomelanin) causes <a href="https://www.sciencedirect.com/science/article/pii/S016953472030375X">less oxidative stress</a>, and is more simple. This means it is easier for stem cells to continue to produce pheomelanin, even as they reduce their activity with ageing.</p> <p>With ageing, red hair tends to fade into strawberry blonde and silvery-white. Grey colour is due to less eumelanin activity, so is more common in those with black and brown hair.</p> <p>Your genetics determine when you’ll start going grey. But you may be able to avoid premature greying by staying healthy, reducing stress and avoiding smoking, too much alcohol and UV exposure.</p> <p>Eating <a href="https://www.healthline.com/health/melanin-in-hair#b-6-and-b-12">a healthy diet</a> may also help because vitamin B12, copper, iron, calcium and zinc all <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290285/">influence melanin production and hair pigmentation</a>.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/239100/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/theresa-larkin-952095">Theresa Larkin</a>, Associate Professor of Medical Sciences, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/is-stress-turning-my-hair-grey-239100">original article</a>.</em></p>

Beauty & Style

How to revive your curls without paying salon prices

<p>Maintaining curly hair takes a lot of time and effort and sometimes no matter what you do, the frizz just cannot be tamed. </p> <p>While getting your hair done at the salon can be a treat, having to pay salon prices to get softness, shine and definition for your curls is just not sustainable in the long run. </p> <p>Enter <a href="https://www.johnfrieda.com/en-au/home/" target="_blank" rel="noopener">John Frieda</a>'s newest Frizz Ease Miraculous Recovery range, which is now infused with repairing ceramides designed to transform frizzy and damaged hair. </p> <p>The Miraculous Recovery Repairing shampoo and conditioner are two of my personal faves, as I could feel the difference in how soft my hair felt after the first use.</p> <p>Not only are the products safe for colour-treated hair, they also made my curls more manageable and easy to style, with the effects lasting for two days, which is amazing considering how quickly my curls can go limp. </p> <p>I also loved how subtle the scent was, and found the most effective way of applying the conditioner was to comb it through my hair with a detangling brush in the shower, as it helps distribute the product evenly. </p> <p>While different curls all need slightly different care, I found the shampoo provided the perfect balance of cleaning build-up on my hair without leaving it dry or flaky. </p> <p>The star of the range was definitely the All-in-1 extra strength serum, which provided extra protection for my colour-treated and chemically treated hair. I love that you can apply this product through wet or dry hair, and it was the perfect way to revive my curls. </p> <p>The Finishing Creme was a bit too thick for my fine, curly hair, but for those with tighter curls or those looking for some extra moisture during more humid days, a light layer of the product would surely tame any flyaways or frizz. </p> <p>With most of their products retailing for around $20 it is an affordable solution to bringing life back into colour-treated and damaged curls. The product can be found in all major supermarkets and pharmacies across <a href="https://www.chemistwarehouse.com.au/shop-online/5571/john-frieda-haircare" target="_blank" rel="noopener">AU</a> and <a href="https://www.chemistwarehouse.co.nz/shop-online/5571/john-frieda-haircare" target="_blank" rel="noopener">NZ</a>. </p> <p><em>Images: Supplied</em></p>

Beauty & Style

Expert reveals why you shouldn’t use hotel hair dryers

<p dir="ltr">An expert has shared why you should avoid using hair dryers that are provided in hotels. </p> <p dir="ltr">Many travellers rely on these handy devices that are often found in bathroom drawers in hotels, instead of packing your own hair dryer that can often take up valuable luggage space. </p> <p dir="ltr">However, trichologist Jacqui McIntosh, who focuses on diseases related to the scalp and hair, said travellers should avoid these appliances at all costs. </p> <p dir="ltr">According to the expert, there's a high chance there are bacteria and germs lurking inside the hair dryer that have been passed between hotel guests.</p> <p dir="ltr">"Using a hairdryer riddled with bacteria and germs does pose health risks and can be detrimental to your hair health," she told <em>The Mirror</em>. </p> <p dir="ltr">McIntosh says when the microorganisms inside a hairdryer make their way onto your hair and scalp, "they can spark infections and irritations, disrupting your hair follicles and slowing down healthy growth."</p> <p dir="ltr">Even without the worry of bacteria and germs, there's a chance of dust and mould lurking inside the appliance, which she says are "troublemakers for your scalp".</p> <p dir="ltr">"Neglected hair dryers are time bombs waiting to go off. Debris buildup inside the device spells overheating, increasing the risk of singeing your hair or scalp," she explained.</p> <p dir="ltr">McIntosh also clarified that, as pointed out in a 2009 study, hairdryers are one of the handful of items that are missed by hotel cleaning staff, so next time you’re staying in a hotel, probably best to bring your own hair dryer. </p> <p dir="ltr"><em>Image credits: Shutterstock </em></p>

Travel Trouble

4 things you’re likely doing that are damaging your hearing

<p>Your hearing is a precious gift, so it’s important to take good care of your ears. We’ve got some advice on the things to avoid, and what you can do to protect your hearing.</p> <p><strong>Using cotton tips</strong></p> <p>Though they’re commonly used for the job, cotton tips should never be used to clean out your ears. In fact, no solid object should be put inside your ears. Cotton tips account for around four per cent of all ruptured eardrums. </p> <p>These innocuous-looking objects can also cause bleeding, scratch your ear canal, or trigger an infection. So put them down and step away. Instead, use a commercial ear cleaner, or even just a few drops of mineral oil, baby oil, or glycerine to soften the earwax.</p> <p><strong>Don’t wait and see</strong></p> <p>If your hearing in one or both ears suddenly disappears without cause, you need to go and see your doctor as soon as you can. It could be inflammation, infection, or a decrease in blood supply to the area. </p> <p>If you need treatment, you’ll likely need it immediately to have any hope of restoring your hearing.</p> <p><strong>Using eardrops without advice</strong></p> <p>There are many over-the-counter eardrops available to help with things like swimmer’s ear. But in extreme cases, these products can cause deafness. Before you use anything, including a home remedy, get your doctor to check that you don’t have a ruptured eardrum. </p> <p>Some people may be born that way, or have had surgery as a child, or suffered an injury. If the ingredients in these drops make their way inside your eardrum, it can cause a lot of pain, and permanent deafness.</p> <p><strong>Always protect your ears</strong></p> <p>It’s incredibly important to protect your ears from permanent damage. Tiny hairs inside your ears act as hearing receptors, and these can be broken by extremely loud noises. Once they’re gone, they don’t come back. </p> <p>So things like loud music, fireworks, machinery, and artillery are all risky to be around. The best thing you can do is cover up with earmuffs whenever you’re around these things – especially if it’s on a regular basis. For extra safety, use earplugs as well.</p> <p><em>Image credits: Shutterstock </em></p>

Body

8 mistakes that make your hair thin

<p>Despite how many products you put load it up with, hair thins with age and there is scarcely anything that you can do to completely fight nature. What you can do is go into prevention mode as early as possible. There are many simple things that we do to our hair daily that is actually causing it a lot of stress and in many cases causing it to thin.</p> <p>So rather than a trip to the hairdresser every other week or falling for flashy and expensive products on cheap advertisements, follow these 8 simple tips to avoid damaging your hair and losing what you have.</p> <p><strong>1. Hot showers</strong></p> <p>We all know that hot water can dehydrate our skin, but did you know the same rule applies to your hair? Ryan Welter, MD, a Boston-based hair transplant surgeon explains; “Not only are you washing your hair’s protecting oils down the drain, but the heat throws your scalps pores into overdrive to keep up with oil production, which can damage the root and lead to additional shedding.”</p> <p><strong>2. Using too many heat tools</strong></p> <p>Ironic, isn’t it? All that that drying and curling we do to make our hair look fabulous is actually doing it the most damage. Not everyone is a wash-and-wear kind of person, though, so if you really can’t part with your heated tools, make sure you prep your strands with a heat protection spray. Also, they may be more expensive but ceramic plated tools are ten times better for your hair. The ceramic plate has a uniform heating system that makes it impossible for it to overheat and cause damage to the hair from burning. Additionally, you’ll get a better aesthetic result.</p> <p><strong>3. Crash dieting</strong></p> <p>Your diet affects everything, so it’s no surprise it effects your hair. Under eating forces, the body to direct the little energy it has to perform essential functions –like helping your heart pump blood-so generating new hair falls by the wayside. The good news is that you can eat certain foods for positive hair health. Lean protein like fish, chicken, lentil and beans all promote growth. Hair is primarily made of protein so it will make or break your hair. You should aim for about 46 grams per day.</p> <p><strong>4. Styling when wet</strong></p> <p>Our strands are never more fragile, and prone to breakage, than when they’re saturated with H20 – this is because the protective cuticle is slightly raised. Brushing or combing locks in the shower, then following with aggressive towel-drying and prompt styling is a recipe for swift breakages. To avoid this, let your hair dry as naturally as possible when you get out of the shower and wait patiently before styling.</p> <p><strong>5. Let’s talk about the colour</strong></p> <p>If your hair is dyed, and especially if it’s bleached, you will be more prone to breakage. However, there are many ways to avoid this. If you can’t be bothered fussing with various different treatments, simply leave your conditioner on for a few minutes rather than washing straight out. This will act like a hair treatment or mask without the hefty price tag. Alternatively, Moroccan oil is naturally high in fatty acids and vitamin E, making it a good treatment for damaged hair. Use sparingly on the ends, it only takes a few minutes to apply.</p> <p><strong>6. Opting for tight hairstyles</strong></p> <p>If you wear your hair back in a tight hairstyle, like a ponytail or bun, chances are it’s contributing to your thinning hair. Pulling on the hair follicles too tightly puts tension on them, damaging them and creating scars that destroy them permanently. This can lead to alopecia, a condition that permanently weakens the follicle and makes it impossible for hair to grow again. </p> <p><strong>7. Over-shampooing</strong></p> <p>The purpose of shampooing your hair is to cleanse the hair and scalp of oil and product build up. However, there is actually such thing as over-shampooing. This can wash away your hairs natural moisture that helps your hair look healthy and dries it out. This is especially true if you’re using a shampoo that’s more tropical scented foam than nutrition for your hair. So how much should you wash it? Unfortunately, there’s no specific algorithm. See what works best for you, stick to it, and always be gentle.</p> <p><strong>8. Using the wrong brush</strong></p> <p>Something as simple as using the wrong hairbrush could be doing you a world of damage. Unfortunately, the thinner your hair, the more damage brushing in general will do. Stick to coming and wide bristle brushes as to not aggravate delicate hair cells. For slick, slightly damp hair, natural-bristle brushes are best and for those who can get away with it, stick to a comb and nothing but the comb. Just be sure to check the teeth for seams or roughness.</p> <p>Finally, always go by the golden rule; if something is going to harm your skin, it’s going to harm your hair. </p> <p><em>Image credits: Shutterstock</em></p>

Beauty & Style

Daughter's incredible gesture surprises her cancer-stricken mother

<p>A brave mother fighting cancer has burst into tears at her daughter's amazing display of solidarity, as her mum continues to battle through chemotherapy. </p> <p>Tracy Mulcahy has been fighting a devastating diagnosis of stage four high-grade ovarian cancer and had started to lose her hair after relentless chemo treatment. </p> <p>Tracy and her daughter Sophie headed to their local hairdressers, where they have become like family after seven years, where Sophie was given the task of shaving her mum's head. </p> <p>To everyone's surprise, Sophie was handed the razor and decided to shave off her own long blonde hair in an emotional display of solitary and strength.</p> <p>Both women burst into tears and held one another, while there was not a dry eye in the salon from other clients and hairdressers. </p> <blockquote class="instagram-media" style="background: #FFF; border: 0; border-radius: 3px; box-shadow: 0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width: 540px; min-width: 326px; padding: 0; width: calc(100% - 2px);" data-instgrm-permalink="https://www.instagram.com/reel/C4h63b2rZYX/?utm_source=ig_embed&utm_campaign=loading" data-instgrm-version="14"> <div style="padding: 16px;"> <div style="display: flex; flex-direction: row; align-items: center;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 40px; margin-right: 14px; width: 40px;"> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 100px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 60px;"> </div> </div> </div> <div style="padding: 19% 0;"> </div> <div style="display: block; height: 50px; margin: 0 auto 12px; width: 50px;"> </div> <div style="padding-top: 8px;"> <div style="color: #3897f0; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: 550; line-height: 18px;">View this post on Instagram</div> </div> <div style="padding: 12.5% 0;"> </div> <div style="display: flex; flex-direction: row; margin-bottom: 14px; align-items: center;"> <div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(0px) translateY(7px);"> </div> <div style="background-color: #f4f4f4; height: 12.5px; transform: rotate(-45deg) translateX(3px) translateY(1px); width: 12.5px; flex-grow: 0; margin-right: 14px; margin-left: 2px;"> </div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(9px) translateY(-18px);"> </div> </div> <div style="margin-left: 8px;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 20px; width: 20px;"> </div> <div style="width: 0; height: 0; border-top: 2px solid transparent; border-left: 6px solid #f4f4f4; border-bottom: 2px solid transparent; transform: translateX(16px) translateY(-4px) rotate(30deg);"> </div> </div> <div style="margin-left: auto;"> <div style="width: 0px; border-top: 8px solid #F4F4F4; border-right: 8px solid transparent; transform: translateY(16px);"> </div> <div style="background-color: #f4f4f4; flex-grow: 0; height: 12px; width: 16px; transform: translateY(-4px);"> </div> <div style="width: 0; height: 0; border-top: 8px solid #F4F4F4; border-left: 8px solid transparent; transform: translateY(-4px) translateX(8px);"> </div> </div> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center; margin-bottom: 24px;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 224px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 144px;"> </div> </div> <p style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; line-height: 17px; margin-bottom: 0; margin-top: 8px; overflow: hidden; padding: 8px 0 7px; text-align: center; text-overflow: ellipsis; white-space: nowrap;"><a style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: normal; line-height: 17px; text-decoration: none;" href="https://www.instagram.com/reel/C4h63b2rZYX/?utm_source=ig_embed&utm_campaign=loading" target="_blank" rel="noopener">A post shared by ⚡️SOUTH WEST BLONDE SPECIALIST ⚡️ (@bambiblonde__)</a></p> </div> </blockquote> <p>The heartwarming moment was captured by the Bambi Blonde salon and posted to their Instagram, where the post racked up hundreds of thousands of likes and comments of support from all over the world.</p> <p>"The whole salon was in tears," owner Claire Lovett said.</p> <p>Sophie has since revealed she decided to do it because she didn't want her mother to "go through this alone".</p> <p>"She means the absolute world to me. She's done everything she could to help me with any issues I've had in the past," Sophie told the Hit WA radio station.</p> <p>Tracy said her daughter's decision was "just insane", saying, "I saw her do it, and I'm like, no, please don't, please don't do this. I don't want you to go through what I'm going through."</p> <p>"I think when I sat down in that hairdresser's chair and prepared myself for the day, but when you actually sit in that chair and normally go to the hairdressers, it's obviously a positive experience." </p> <p>"And then to have to look in and see that there wasn't a lot of hair left at that point. And to see Sophie do that and sacrifice her own hair for me, it was just insane."</p> <p>The family have set up a <a href="https://www.gofundme.com/f/tracys-battle-stage-4-high-grade-ovarian-cancer?utm_campaign=p_cp+fundraiser-sidebar&utm_medium=copy_link_all&utm_source=customer" target="_blank" rel="noopener">GoFundMe</a> page to help with the costs of Tracy's treatment. </p> <p><em>Image credits: Instagram / GoFundMe</em></p>

Caring

From straight to curly, thick to thin: here’s how hormones and chemotherapy can change

<p><em><a href="https://theconversation.com/profiles/theresa-larkin-952095">Theresa Larkin</a>, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p>Head hair comes in many colours, shapes and sizes, and hairstyles are often an expression of personal style or cultural identity.</p> <p><a href="https://pubmed.ncbi.nlm.nih.gov/36631178/">Many different genes</a> determine our hair texture, thickness and colour. But some people’s hair changes around the time of puberty, pregnancy or after chemotherapy.</p> <p>So, what can cause hair to become curlier, thicker, thinner or grey?</p> <h2>Curly or straight? How hair follicle shape plays a role</h2> <p>Hair is made of <a href="https://my.clevelandclinic.org/health/body/23204-keratin">keratin</a>, a strong and insoluble protein. Each hair strand grows from its own <a href="https://www.ncbi.nlm.nih.gov/books/NBK470321/">hair follicle</a> that extends deep into the skin.</p> <p>Curly hair forms due to asymmetry of both the <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6894537/">hair follicle and the keratin</a> in the hair.</p> <p>Follicles that produce <a href="https://www.medicalnewstoday.com/articles/318524">curly hair</a> are asymmetrical and curved and lie at an angle to the surface of the skin. This kinks the hair as it first grows.</p> <p>The asymmetry of the hair follicle also causes the keratin to bunch up on one side of the hair strand. This pulls parts of the hair strand closer together into a curl, which maintains the curl as the hair continues to grow.</p> <p>Follicles that are symmetrical, round and perpendicular to the skin surface produce straight hair.</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/567020/original/file-20231221-29-fp0wci.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=1000&fit=clip"><img src="https://images.theconversation.com/files/567020/original/file-20231221-29-fp0wci.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=754&fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/567020/original/file-20231221-29-fp0wci.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=600&h=600&fit=crop&dpr=1 600w, https://images.theconversation.com/files/567020/original/file-20231221-29-fp0wci.jpg?ixlib=rb-1.1.0&q=30&auto=format&w=600&h=600&fit=crop&dpr=2 1200w, https://images.theconversation.com/files/567020/original/file-20231221-29-fp0wci.jpg?ixlib=rb-1.1.0&q=15&auto=format&w=600&h=600&fit=crop&dpr=3 1800w, https://images.theconversation.com/files/567020/original/file-20231221-29-fp0wci.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=754&h=754&fit=crop&dpr=1 754w, https://images.theconversation.com/files/567020/original/file-20231221-29-fp0wci.jpg?ixlib=rb-1.1.0&q=30&auto=format&w=754&h=754&fit=crop&dpr=2 1508w, https://images.theconversation.com/files/567020/original/file-20231221-29-fp0wci.jpg?ixlib=rb-1.1.0&q=15&auto=format&w=754&h=754&fit=crop&dpr=3 2262w" alt="A diagram shows the hair follicle shape of straight, curly and coiled hair." /></a><figcaption><span class="caption">Each hair strand grows from its own hair follicle.</span> <span class="attribution"><a class="source" href="https://www.shutterstock.com/image-vector/diagram-hair-follicle-shape-vector-illustration-2248429145">Mosterpiece/Shutterstock</a></span></figcaption></figure> <h2>Life changes, hair changes</h2> <p>Our hair undergoes repeated cycles throughout life, with different stages of growth and loss.</p> <p>Each hair follicle contains stem cells, which multiply and <a href="https://www.frontiersin.org/articles/10.3389/fcell.2022.899095/full">grow into a hair strand</a>.</p> <p>Head hairs spend most of their time in <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5905671/">the growth phase</a>, which can last for several years. This is why head hair can grow so long.</p> <p>Let’s look at the life of a single hair strand. After the growth phase is a transitional phase of about two weeks, where the hair strand stops growing. This is followed by a resting phase where the hair remains in the follicle for a few months before it <a href="https://www.healthline.com/health/stages-of-hair-growth">naturally falls out</a>.</p> <p>The hair follicle <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/exd.13347">remains in the skin</a> and the stems cells grow a new hair to repeat the cycle.</p> <p>Each hair on the scalp is replaced <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4606321/#b3">every three to five years</a>.</p> <h2>Hormone changes during and after pregnancy alter the usual hair cycle</h2> <p>Many women notice their hair is <a href="https://www.medicalnewstoday.com/articles/pregnancy-hair">thicker during pregnancy</a>.</p> <p>During pregnancy, high levels of <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4908443/">oestrogen, progesterone and prolactin</a> prolong the resting phase of the hair cycle. This means the hair <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7432488/">stays in the hair follicle for longer</a>, with less hair loss.</p> <p>A drop in hormones a few months after delivery causes increased hair loss. This is due to all the hairs that remained in the resting phase during pregnancy falling out in a fairly synchronised way.</p> <h2>Hair can change around puberty, pregnancy or after chemotherapy</h2> <p>This is related to the genetics of hair shape, which is an example of <a href="https://www.biologyonline.com/dictionary/incomplete-dominance">incomplete dominance</a>.</p> <p>Incomplete dominance is when there is a middle version of a trait. For hair, we have curly hair and straight hair genes. But when someone has one curly hair gene and one straight hair gene, they can have wavy hair.</p> <p>Hormonal changes that occur around <a href="https://clinicalepigeneticsjournal.biomedcentral.com/articles/10.1186/s13148-019-0780-4">puberty</a> and <a href="https://www.mdpi.com/1422-0067/23/20/12698">pregnancy</a> can affect the function of genes. This can cause the curly hair gene of someone with wavy hair to become more active. This can change their hair from wavy to curly.</p> <p>Researchers have identified that activating specific genes can change hair in pigs <a href="https://www.frontiersin.org/articles/10.3389/fgene.2023.1184015/full">from straight to curly</a>.</p> <p><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5759815/">Chemotherapy</a> has very visible effects on hair. Chemotherapy kills rapidly dividing cells, <a href="https://jamanetwork.com/journals/jamaoncology/fullarticle/2628766">including hair follicles</a>, which causes hair loss. Chemotherapy can also have <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1988866/">genetic effects</a> that influence hair follicle shape. This can cause hair to <a href="https://www.medicalnewstoday.com/articles/chemo-curls">regrow with a different shape</a> for the first few cycles of hair regrowth.</p> <h2>Hormonal changes as we age also affect our hair</h2> <p>Throughout life, <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7432488/">thyroid hormones</a> are essential for production of keratin. Low levels of thyroid hormones can cause dry and brittle hair.</p> <p><a href="https://pubmed.ncbi.nlm.nih.gov/36578854/">Oestrogen and androgens</a> also regulate hair growth and loss, particularly as we age.</p> <p>Balding in males is due to <a href="https://theconversation.com/starting-to-thin-out-hair-loss-doesnt-have-to-lead-to-baldness-34984">higher levels of androgens</a>. In particular, high dihydrotestosterone (sometimes shortened to DHT), which is produced in the body from testosterone, has a role in <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7269836/">male pattern baldness</a>.</p> <p>Some women experience <a href="https://theconversation.com/health-check-why-does-womens-hair-thin-out-39126">female pattern hair loss</a>. This is caused by a combination of genetic factors plus lower levels of <a href="https://www.mdpi.com/2077-0383/12/3/893">oestrogen and higher androgens</a> after menopause. The hair follicles become smaller and smaller until they no longer produce hairs.</p> <p>Reduced function of the cells that produce <a href="https://www.health.com/mind-body/what-going-gray-early-can-tell-you-about-your-health">melanin</a> (the pigment that gives our hair colour) is what causes greying.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/219329/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><a href="https://theconversation.com/profiles/theresa-larkin-952095"><em>Theresa Larkin</em></a><em>, Associate professor of Medical Sciences, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p><em>Image credits: </em><em>Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/from-straight-to-curly-thick-to-thin-heres-how-hormones-and-chemotherapy-can-change-your-hair-219329">original article</a>.</em></p>

Caring

Britney Spears’ memoir is a reminder of the stigma and potential damage of child stardom

<p><em><a href="https://theconversation.com/profiles/jane-oconnor-1483447">Jane O’Connor</a>, <a href="https://theconversation.com/institutions/birmingham-city-university-920">Birmingham City University</a></em></p> <p>Britney Spears’ new memoir, The Woman in Me, illustrates once again the potential lifelong damage that can be caused by being a child star. Like many before her, including <a href="https://www.britannica.com/biography/Judy-Garland">Judy Garland</a> and <a href="https://www.britannica.com/biography/Michael-Jackson">Michael Jackson</a>, Spears was ushered into the dangerous terrain of childhood fame by the adults who were supposed to be protecting her, and was utterly unprepared to deal with the fallout.</p> <p>Spears’ <a href="https://www.bbc.co.uk/news/world-us-canada-53494405">father’s conservatorship</a>, controlling every aspect of her personal and professional life, was finally rescinded in 2021. She is now able to share the details of her extraordinary years in the limelight and beyond.</p> <p>From a sociological perspective, childhood is considered socially constructed. This means that there are specific ways of raising children which are socially and culturally defined. We discard these conventions surrounding the early years of life at our peril.</p> <p>The boundaries and rules around what is and is not acceptable during childhood, and the normal activities and institutions that shape the experience of being a child have developed over the centuries for a reason – to try and keep children safe from the harsh realities of the adult world.</p> <p>Being sexualised and valued for your appearance, being paid to work, having to deal with criticism and unwanted attention from strangers – these are all difficult aspects of growing up. Children and teens need careful support and guidance if they are to navigate safely into their adult lives and identities.</p> <p>The experience of childhood fame throws aside this social safety net for children in every possible way, and the consequences can be disastrous.</p> <h2>The price of child fame</h2> <p>From the earliest child stars of Hollywood’s golden age, through the television sitcoms and shows of the mid-20th century, the rise of the pop and film industries in the following decades and the burst in popularity of reality TV and talent shows of the early 21st century, <a href="https://www.tandfonline.com/doi/abs/10.1080/17482798.2011.584378">children have always featured</a>. Many have paid a heavy price for their often short period of fame.</p> <p>Sad stories of <a href="https://www.or-nc.com/why-do-child-stars-become-addicted-to-drugs/">drug and alcohol addiction</a>, <a href="https://www.hitc.com/en-gb/2022/11/02/uncle-fester-star-jackie-coogans-tragic-life-child-fortune-to-horror-crash">family disputes</a>, <a href="https://www.ranker.com/list/child-actors-who-became-criminals/nathan-gibso">criminal activity</a> and <a href="https://www.dailystar.co.uk/showbiz/us-showbiz/former-nickelodeon-star-drake-bells-29769568">toxic relationships</a> are frequently reported by the media. These reinforce the stereotypical “child star gone bad” and “too much too young” narratives that the wider public has come to expect.</p> <p>For example, stories abound of <a href="https://metro.co.uk/2020/02/11/macaulay-culkin-reveals-never-divorced-parents-emancipated-12222457/">Macaulay Culkin “divorcing” his controlling parents</a> and his difficulties transitioning into adult life, <a href="https://www.belfasttelegraph.co.uk/entertainment/film-tv/why-it-was-not-a-wonderful-life-for-macaulay-culkin-after-he-found-fame-in-the-hit-christmas-film-home-alone/37620091.html">feeling trapped</a> in the image of boyhood innocence of his most famous character, Kevin in the Home Alone movies.</p> <p><a href="https://books.google.co.uk/books?id=kSJ8XjTw10kC&printsec=frontcover&redir_esc=y#v=onepage&q&f=false">In her autobiography</a> actor Drew Barrymore has written about her casual acceptance at Hollywood parties and consumption of alcohol at a very young age, following her role in <a href="https://www.imdb.com/title/tt0083866/">E.T.</a> (1982) aged five.</p> <p>There is also the tragic life and death of <a href="https://www.theguardian.com/tv-and-radio/2010/may/29/gary-coleman-obituary">Gary Coleman</a>, cute kid star of the American sitcom <a href="https://www.imdb.com/title/tt0077003/">Diff'rent Strokes</a> (1978-1986).</p> <p>Coleman, who died at 42 following a history of <a href="https://nypost.com/2010/05/29/troubled-80s-child-star-gary-colemans-life-is-cut-short-at-42/#:%7E:text=In%202005%2C%20Coleman%20moved%20to,and%20%22wanted%20to%20die.%22">substance abuse</a> and <a href="https://www.salon.com/2010/05/28/gary_coleman_dies/">depression</a>, reported being <a href="https://www.theguardian.com/tv-and-radio/2010/may/29/gary-coleman-obituary">deeply humiliated</a> by people asking: “Didn’t you used to be …?” when he was working as a security guard at a supermarket as an adult.</p> <h2>Other possibilities</h2> <p>It’s important to note, however, that a difficult trajectory is not the experience of all child stars and former child stars. The actors from the Harry Potter films, for example, seem <a href="https://www.theguardian.com/film/2021/oct/22/the-not-so-cursed-child-did-harry-potter-mark-the-end-of-troubled-young-actors">largely to have transitioned well</a> into adult lives and careers – some in the spotlight, others not.</p> <p>And the new generation of famous children and teens such as <a href="https://www.gq.com/story/stranger-things-millie-bobby-brown">Millie Bobby Brown</a>, star of the Netflix show <a href="https://theconversation.com/stranger-things-is-the-upside-down-to-disneys-cute-and-cuddly-universe-83417">Stranger Things</a> (2016-present), seem more prepared for fame than their predecessors, in control of their images and identities via their own social media platforms and <a href="https://www.bbc.co.uk/news/world-44045291">potentially protected to some extent</a> from extreme sexualisation by the MeToo movement.</p> <p>Even so, Brown <a href="https://www.popbuzz.com/tv-film/news/millie-bobby-brown-birthday-instagram-post/">commented on her 16th birthday</a> that: “There are moments I get frustrated from the inaccuracy, inappropriate comments, sexualization, and unnecessary insults.”</p> <p>For Spears though, these were more than moments. She details in her memoir how the constant public scrutiny of her body and physical appearance, being valued for her sexuality and treated as a commodity have characterised her entire life.</p> <p>It is no wonder <a href="https://people.com/britney-spears-reveals-why-shaved-off-hair-in-2007-exclusive-8362494">she shaved her head</a> in 2007, a move interpreted by the media as her having “gone mad”, but in fact a powerful indication of her anger at being perceived as nothing more than a dancing sex-doll. As she writes in her memoir: "I knew a lot of guys thought long hair was hot. Shaving my head was a way of saying to the world: fuck you. You want me to be pretty for you? Fuck you. You want me to be good for you? Fuck you. You want me to be your dream girl? Fuck you."</p> <p>The sociologist Erving Goffman wrote about the stigma of having a “<a href="https://www.howcommunicationworks.com/blog/2020/12/16/what-is-stigma-explaining-goffmans-idea-of-spoiled-identity">spoiled identity</a>” whereby people carry with them the public shame of transgression or physical difference.</p> <p>Being a former child star can be stigmatising for many reasons, including being constantly compared to an ideal younger version of yourself and not having had a “normal” childhood or conventional family relationships.</p> <p>In this memoir, Britney attempts to face down that stigma and reclaim her identity and person-hood as an adult. In doing so, she demonstrates that it can be possible to leave the dangerous terrain of early fame behind – but the journey is a tough one.</p> <p><em><a href="https://theconversation.com/profiles/jane-oconnor-1483447">Jane O’Connor</a>, Reader in Childhood Studies, <a href="https://theconversation.com/institutions/birmingham-city-university-920">Birmingham City University</a></em></p> <p><em>Image credits: Getty Images / Instagram, </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/britney-spears-memoir-is-a-reminder-of-the-stigma-and-potential-damage-of-child-stardom-216545">original article</a>.</em></p>

Music

Why does my hair turn green from the swimming pool?

<p><em><a href="https://theconversation.com/profiles/magdalena-wajrak-1432339">Magdalena Wajrak</a>, <a href="https://theconversation.com/institutions/edith-cowan-university-720">Edith Cowan University</a></em></p> <p>If you are a blonde like me and enjoy laps in a swimming pool, you may have noticed your hair acquires a green tint after frequent swims in chlorinated water.</p> <p>This happens to both bleached and natural blondes. In fact, the green tinge happens to everyone, but it’s less visible on dark hair and those whose hair isn’t damaged by chemical treatments such as bleaching.</p> <p>But what exactly causes this green discoloration, and what can we do about it? Most of us blame the chlorine in the pool water. However, although chlorine does play a part, it is not the main culprit.</p> <h2>Which chemicals in the pool turn the hair green?</h2> <p>The element to blame for the green staining of hair is copper.</p> <p>The main source of copper is copper sulfate (CuSO₄), a compound added to swimming pools to prevent the growth of algae. <a href="https://www.sciencedirect.com/science/article/pii/S1568988320301803?via%3Dihub">Contact with algae</a> can cause skin irritation and respiratory issues, and ingesting water with algae can lead to serious gastrointestinal problems. Only a small amount (around 0.5mg per litre or 0.5 parts per million) of copper sulfate is needed to prevent algal growth.</p> <p>However, copper can also enter swimming pools through the corrosion of water pipes, so concentrations may be higher in some pools.</p> <p>Copper sulfate crystals are greenish-blue in colour. So, when hair comes into contact with copper ions – a positively charged variant of a copper atom with extra electrons – those ions get absorbed by the hair and cause the greenish hue.</p> <p>Scientists were fascinated by the green “pool hair” phenomenon as far back as the 1970s, so we actually have research data on copper being the cause.</p> <p>One very <a href="https://jamanetwork.com/journals/jamadermatology/article-abstract/538197">interesting study in 1978</a> performed experiments by immersing hair samples into water containing different concentrations of copper ions, chlorine and various pH values (neutral and basic). Their results showed hair exposed to free copper ions does turn green.</p> <p>Furthermore, when hair is oxidised (meaning electrons are removed from the hair proteins) by chlorine, it actually damages the hair, enhancing the absorption of copper ions. Hair submerged in water with chlorine but without copper ions did not turn green. Meanwhile, hair exposed to water with only copper ions and no chlorine still formed a green colour.</p> <p>Hence, chlorine by itself does not play a role in causing the green hue we see in “pool hair”, but it does exacerbate it.</p> <h2>So, how does copper get into the hair?</h2> <p><a href="https://doi.org/10.1007/978-1-4684-0943-7_24">Other research teams</a> have conducted <a href="https://doi.org/10.1071/ch9682437">more extensive studies</a>, using sophisticated instruments, such as scanning electron microscopy, to examine how exactly copper ions attach to the hair.</p> <p>Our hair is predominantly composed of protein called keratin. Keratin is classified as a “structural fibrous protein”, meaning it has an elongated, sheet-like structure.</p> <p>The keratin structure is composed of various <a href="https://chem.libretexts.org/Courses/University_of_Kentucky/UK%3A_CHE_103_-_Chemistry_for_Allied_Health_(Soult)/Chapters/Chapter_4%3A_Structure_and_Function/4.4%3A_Functional_Groups">chemical groups</a> (types of atom groupings with similar properties), such as carboxyl groups, amino groups and disulfide groups. Copper ions have the ability to form bonds with these groups, forming a copper-keratin complex. This complex remains in the hair, causing it to appear green.</p> <p>Interestingly, the most recent study <a href="https://doi.org/10.32657/10356/142466">conducted in 2020</a>, showed copper ions mainly bind to the disulfide groups. This study also found other metal ions such as zinc, lead, chromium and mercury also bind to hair in the same way. This is very useful in <a href="https://theconversation.com/forensic-breakthrough-study-suggests-humans-can-be-identified-by-the-proteins-in-their-hair-65051">forensic analysis</a>, for example, because forensic scientists can analyse hair samples to determine if a person has been exposed to a particular metal.</p> <p>Light-coloured hair already has the most visible green discoloration, but research has shown that damaged hair, caused by bleaching, straightening, or exposure to sun, is the <a href="https://pubmed.ncbi.nlm.nih.gov/19586601/">most susceptible</a> to the binding of copper ions. This is because in damaged hair the disulfide groups have “broken bonds” (the link that holds the elements within these groups together is broken), making it easier for the copper ions to bind to the hair.</p> <h2>Can I prevent the green colour or get rid of it?</h2> <p>To prevent your hair from turning green in a swimming pool, you have two basic options. The first is a physical barrier – just wear a swim cap.</p> <p>The second option is chemical – you can pre-treat your hair with an alkaline shampoo. <a href="https://www.sciencedirect.com/science/article/abs/pii/S0891584918310050">Studies have shown</a> under alkaline pH conditions, the copper ions won’t attach to the hair. To treat your hair before going to the pool, you can either use a shampoo with a pH higher than 7, or you can even try mixing some baking soda into your regular shampoo.</p> <p>But what can you do if your hair has already turned greenish? Well, you can try washing your hair with a shampoo designed to achieve this, typically marketed as a “chlorine removal” shampoo. These products contain a chemical called EDTA – it can bind to metal ions (such as copper) and thus will remove copper from the hair.</p> <p>You may have heard tomato sauce or ketchup is a good way to get the green out of your pool hair – potentially because the red pigments are supposed to “cancel out” the green ones. However, I’m not aware of any scientific evidence this would work.</p> <p><em>Correction: This article has been amended to clarify that alkaline shampoos have a pH higher than 7, not lower.</em><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/211736/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><a href="https://theconversation.com/profiles/magdalena-wajrak-1432339"><em>Magdalena Wajrak</em></a><em>, Senior lecturer, Chemistry, <a href="https://theconversation.com/institutions/edith-cowan-university-720">Edith Cowan University</a></em></p> <p><em>Image </em><em>credits: Getty Images</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/why-does-my-hair-turn-green-from-the-swimming-pool-211736">original article</a>.</em></p>

Beauty & Style

Tourist accused of causing over $8,000 in damages to iconic Roman statue

<p>A 22-year-old German tourist has been accused of causing around €5,000 (A$8,400) in damages to the 16th-century Fountain of Neptune in the Piazza della Signoria, Italy. </p> <p>Surveillance footage obtained by the police allegedly show the tourist - who has not been named - climbing over the protective barrier around the monument in the early hours of Monday morning as he posed for a photo on the statue. </p> <p>His two friends, who stood outside of the barrier, took the photos of him and they all fled the scene when the alarm went off, according to city authorities.</p> <p>"According to the investigators' reconstruction, after 1 o'clock this morning the tourist, in Piazza della Signoria with two other friends, climbed over the fence of the Neptune Fountain and climbed onto the edge of the pool," the statement read. </p> <p>"With a jump he then climbed onto the horse's leg, reaching the base of the carriage and, after having some photos taken by his friends, he climbed down," they added.</p> <p>"During the descent he placed his foot again on the hoof, damaging it. As soon as the alarm went off, however, the young man had already managed to escape with the two others." </p> <p>The tourist will be charged under the city penal code that prohibits the "destruction, dispersion, deterioration, disfigurement, soiling or illicit use of cultural or landscape assets."</p> <p>He has been detained in Florence and could be fined and banned from entering the city if convicted. </p> <p>Image:<em> X (formerly Twitter)</em></p>

Travel Trouble

What is dandruff? How do I get rid of it? Why does it keep coming back?

<p><em><a href="https://theconversation.com/profiles/lorraine-mackenzie-1420658">Lorraine Mackenzie</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a> and <a href="https://theconversation.com/profiles/sean-mangion-1420661">Sean Mangion</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180"><em>University of South Australia</em></a></em></p> <p>Dandruff can be dry, like snowflakes, or greasy, with yellow clumps. <a href="https://www.ncbi.nlm.nih.gov/books/NBK551707/">Up to half</a> of all adults have had this scalp condition at one point, so you’ll no doubt know about these skin flakes and the itchiness.</p> <p>Dandruff can be <a href="https://onlinelibrary.wiley.com/doi/10.1111/j.1439-0507.2008.01624.x">embarrassing</a>. It can affect many aspects of people’s lives, such as how they socialise, how they style their hair, and what clothes they wear.</p> <p>Dandruff is not a modern problem. In fact, it has been around for millennia and was <a href="https://pubmed.ncbi.nlm.nih.gov/2181905/">described</a> by Greek physicians. We don’t know for sure whether our ancestors were as bothered by it as much as we are today. But they were interested in what causes it.</p> <h2>What causes dandruff?</h2> <p>Dandruff is mainly caused by the yeast <em><a href="https://www.cell.com/cell-host-microbe/pdf/S1931-3128(19)30106-4.pdf">Malassezia</a></em>. The yeast lives on most people’s skin, either on the surface or in the opening of the hair follicle, the structure that surrounds a hair’s root and strand.</p> <p>The yeast feeds on sebum, the natural moisturiser secreted by your sebaceous glands to stop your skin drying out. These glands are attached to every hair follicle and the hair provides a dark, sheltered micro-environment ideal for the yeast to flourish.</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/536003/original/file-20230706-22-6t0yr8.png?ixlib=rb-1.1.0&q=45&auto=format&w=1000&fit=clip"><img src="https://images.theconversation.com/files/536003/original/file-20230706-22-6t0yr8.png?ixlib=rb-1.1.0&q=45&auto=format&w=754&fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/536003/original/file-20230706-22-6t0yr8.png?ixlib=rb-1.1.0&q=45&auto=format&w=600&h=520&fit=crop&dpr=1 600w, https://images.theconversation.com/files/536003/original/file-20230706-22-6t0yr8.png?ixlib=rb-1.1.0&q=30&auto=format&w=600&h=520&fit=crop&dpr=2 1200w, https://images.theconversation.com/files/536003/original/file-20230706-22-6t0yr8.png?ixlib=rb-1.1.0&q=15&auto=format&w=600&h=520&fit=crop&dpr=3 1800w, https://images.theconversation.com/files/536003/original/file-20230706-22-6t0yr8.png?ixlib=rb-1.1.0&q=45&auto=format&w=754&h=653&fit=crop&dpr=1 754w, https://images.theconversation.com/files/536003/original/file-20230706-22-6t0yr8.png?ixlib=rb-1.1.0&q=30&auto=format&w=754&h=653&fit=crop&dpr=2 1508w, https://images.theconversation.com/files/536003/original/file-20230706-22-6t0yr8.png?ixlib=rb-1.1.0&q=15&auto=format&w=754&h=653&fit=crop&dpr=3 2262w" alt="Diagram of skin cross-section showing hair follicle and other skin structures" /></a><figcaption><span class="caption">The yeast that causes dandruff lives on the skin surface and in the opening of the hair follicle.</span> <span class="attribution"><a class="source" href="https://www.shutterstock.com/image-vector/medical-education-chart-biology-hair-diagram-645657787">Shutterstock</a></span></figcaption></figure> <p>As the yeast grows, it releases molecules that irritate the skin and disrupts how the skin normally renews itself. This causes the cells to cluster together, appearing as white flakes. When there is excess sebum, this can mix with the cells and cause the dandruff to appear <a href="https://www.headandshoulders.co.in/en-in/healthy-hair-and-scalp/dandruff/yellow-dandruff">yellow</a>.</p> <p>The link between dandruff and yeast was made nearly 150 years ago. The person who first identified and described this yeast <a href="https://www.cell.com/cell-host-microbe/pdf/S1931-3128(19)30106-4.pdf">in 1874</a> was Louis-Charles Malassez (the yeast’s namesake).</p> <h2>Why do I have dandruff?</h2> <p>As <em>Malassezia</em> is found on most people, why do some people get dandruff and others don’t? This depends on a range of factors.</p> <p>These include the quality of your skin barrier. This may mean yeast can penetrate deeper if the skin is damaged in some way, for example, if it’s sunburnt. Other factors include your immunity, and external factors, such as which hair-care products you use.</p> <p>How <em>Malassezia</em> grows also depends on the <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4864613/">balance</a> of other microorganisms that live on your skin, such as bacteria.</p> <h2>How do I get rid of dandruff?</h2> <p>Dandruff is mostly treated with <a href="https://www.sciencedirect.com/science/article/abs/pii/S0939641123000292?via%3Dihub">anti-fungal</a> shampoos and scalp treatments to dampen down growth of <em>Malassezia</em>. The shampoos most commonly contain the anti-fungal agent <a href="https://pubmed.ncbi.nlm.nih.gov/34575891/">zinc pyrithione</a> (ZnPT for short). Other common anti-fungals in shampoos include selenium sulfide, ketoconazole and coal tar.</p> <p>You can also treat dandruff with scalp masks and scrubs that help restore the scalp barrier, by reducing inflammation and irritation. But as these may not have any anti-fungal action, your dandruff is likely to return.</p> <p>Home remedies <a href="https://www.healthline.com/nutrition/ways-to-treat-dandruff#7.-Omega-3s">include</a> tea tree oil, coconut or other oils, and honey. There is some evidence to support their use, mostly from <a href="https://pubmed.ncbi.nlm.nih.gov/35642120/">studies</a> that show extracts from botanical ingredients can reduce growth of the yeast in the lab. But there is great variation in the quality and composition of these ingredients.</p> <p>There is also the risk of making the problem worse by providing more oils that the yeast will enjoy, causing more imbalance to the scalp micro-organisms and leading to more irritation.</p> <p>So it’s best to stick with commercial products.</p> <h2>Why does my dandruff come back?</h2> <p>Your dandruff is likely to return unless the active ingredients in your shampoo can reach the right spot, at the right concentration, for the right amount of time needed to kill the yeast.</p> <p>Our <a href="https://pubmed.ncbi.nlm.nih.gov/36842718/">research</a> focussing on zinc pyrithione-based products showed these shampoos reached the skin surface. But they less-reliably ended up in the harder-to-reach hair follicles.</p> <p>We found the zinc pythione seemed <a href="https://pubmed.ncbi.nlm.nih.gov/35631659/">to target</a> the top of the follicles rather than deep into the follicles.</p> <p>So this may explain why dandruff keeps on coming back. Your shampoo’s active ingredient may not reach the yeast that causes your dandruff.</p> <p>We don’t yet know how we can encourage existing formulations to penetrate deeper into the follicles.</p> <h2>What about future treatments?</h2> <p>We’ll likely see new formulations of dandruff shampoos and scalp treatments that better deliver the active ingredient to where it’s needed – deeper into the hair follicles.</p> <p>We can also expect new active ingredients, such as <a href="https://pubmed.ncbi.nlm.nih.gov/28766952/">carbonic anhydrase</a> enzymes. These might target how the yeast grows in a different way to current active ingredients.</p> <p>We are also beginning to see the development of creams and lotions that aim to boost the health balance of flora of the skin, much like we see with similar products for the gut. These include pre-biotics (supplements or food for skin flora) or pro-biotics (products that contain skin flora). However we have <a href="https://www.mdpi.com/2079-9284/8/3/90/htm">much to learn</a> about these types of formulations.</p> <h2>In a nutshell</h2> <p>Dandruff is annoying, treatment helps, but you may need to repeat it. Hopefully, we can develop improved shampoos that better deliver the active ingredient to where it’s needed.</p> <p>But we need to strike a balance. We don’t want to eliminate all micro-organisms from our skin.</p> <p>These are important for our immunity, including preventing more disease-causing microbes (pathogens) from moving in. They also help the skin produce antimicrobial peptides (short proteins) that protect us from pathogens.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/201082/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/lorraine-mackenzie-1420658">Lorraine Mackenzie</a>, Associate Professor, Clinical and Health Sciences, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a> and <a href="https://theconversation.com/profiles/sean-mangion-1420661">Sean Mangion</a>, PhD Candidate, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/what-is-dandruff-how-do-i-get-rid-of-it-why-does-it-keep-coming-back-201082">original article</a>.</em></p>

Body

Big hair? Bald? How much difference your hair really makes to keep you cool or warm

<p><a href="https://theconversation.com/profiles/theresa-larkin-952095">Th<em>eresa Larkin</em></a><em>, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p>We have <a href="https://theconversation.com/health-check-why-does-womens-hair-thin-out-39126">millions</a> of hair follicles on our body, including around 100,000 on our scalp.</p> <p>This might sound like a lot of hair, yet humans are described as “hairless”. We have evolved to be the only mammals with a relatively hairless body, but still with scalp hair.</p> <p>So how does your hair affect your body temperature when it’s hot or cold?</p> <p>Compared with other animals, our hair does not have as much influence on keeping us warm or cool as you might think.</p> <h2>Essential to our survival</h2> <p>Our brain function and body’s metabolism depend on an optimal temperature of around 37℃. Thermoregulation maintains this body temperature, even when we are exposed to a hotter or colder external temperature.</p> <p>For non-human mammals, body hair or fur plays a role in protecting against environmental cold or heat.</p> <p>For instance, a heavy fur coat helps keep a polar bear <a href="https://polarbearsinternational.org/polar-bears-changing-arctic/polar-bear-facts/adaptions-characteristics/">warm</a> in the cold. But fur also keeps an animal cool in the heat because it can <a href="https://www.jstor.org/stable/25064866">absorb or reflect</a> radiant heat.</p> <p>Scientists think this is why humans have kept hair on our heads. Our heads are exposed to the most heat from the sun, and scalp hair keeps our heads cool.</p> <p>Research published just last week <a href="https://www.pnas.org/doi/10.1073/pnas.2301760120">suggests</a> curly hair provides the best heat protection. That’s because curly hair’s thicker layer of insulation reduces the amount of sun that reaches the scalp.</p> <h2>But hair is not the only factor</h2> <p>When humans moved from living in the jungle to the savannah, they needed to walk and run long distances in the sun. This meant they needed a way to handle the increased body temperature that comes with physical activity in the heat.</p> <p>Sweating is the best way to lose heat and cool down, but the presence of hair reduces sweating and heat loss from the skin.</p> <p>So humans evolved to <a href="https://www.pnas.org/doi/10.1073/pnas.1113915108">lose body hair</a> to be better adapted to exercising in the heat. Fewer hair follicles in our skin made room for more sweat glands. This made our skin optimal for sweat evaporation – and the <a href="https://theconversation.com/want-to-keep-cool-on-hot-summer-days-heres-how-34489">heat loss</a> that goes with it – to keep us cool.</p> <h2>So what’s best in the heat?</h2> <p>You might think removing body hair or having a bald head is best for sweating and keeping cool when exercising in the heat. However, it’s not that simple.</p> <p>Removing head hair would increase the <a href="https://www.pnas.org/doi/10.1073/pnas.2301760120">amount of sun</a> that reaches your scalp. This means you would need to <a href="https://pubmed.ncbi.nlm.nih.gov/20683812/">sweat more</a> during exercise in the sun to reduce an increase in body temperature, but not by much.</p> <p>In fact, it’s the <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4667044/#:%7E:text=The%20body%20hair%20is%20advantageous,heat%20removal%20during%20heat%20stress.">least hairy</a> areas of our body that have the highest sweat rates during exercise. These are our forehead, neck, feet and hands.</p> <p>So the best way to keep cool in the heat is to keep these areas uncovered (but still use sunscreen). Removing body hair will not have a large impact on your overall sweat rate.</p> <h2>How about when it’s cold?</h2> <p>Our body hair and head hair theoretically have a role in keeping us warm, but the effects are minimal.</p> <p>When we are cold, the muscles of the hair follicles on the body contract to cause the hairs to stand straight. This is an attempt to trap heat close to the body and we see this as goosebumps. However, because our body hair is so thin, this does not have a big effect in keeping us warm.</p> <p>Our head hair can prevent some heat loss from the head, but again this is limited.</p> <p>When it’s cold, heat can still be lost through the <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4667044/#:%7E:text=The%20body%20hair%20is%20advantageous,heat%20removal%20during%20heat%20stress.">skin of the head</a> regardless of your hairstyle.</p> <p>The scalp also has only a very thin layer of fat compared to the rest of our skin, so our head has less insulation to protect against the cold.</p> <p>A warm hat or beanie is the only way to prevent too much heat lost from the head.</p> <h2>In a nutshell</h2> <p>Our head and body hair, or lack of it, does have a small role in how you maintain your body temperature.</p> <p>But overall, your hairstyle does not influence whether you feel warm or cool.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/201380/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/theresa-larkin-952095">Theresa Larkin</a>, Associate professor of Medical Sciences, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/big-hair-bald-how-much-difference-your-hair-really-makes-to-keep-you-cool-or-warm-201380">original article</a>.</em></p>

Beauty & Style

5 surprising factors damaging your heart

<p>It’s important to maintain heart health at all stages of life, but it becomes particularly crucial as we age – after all, the older you get, the older your heart becomes, too. And even though you might be taking all the right precautions (e.g. quitting smoking, eating a healthy diet, exercising regularly), you could be tarnishing your ticker without even realising it. Here are five things you didn’t know could negatively affect your heart health.</p> <p><strong>1. Damaged hearing</strong> – if you’ve spent much of your life working or living in noisy areas or regularly attending loud events (i.e. those rock concerts you frequented back in the day!), beware. A 2015 study found that people with high-frequency hearing loss in both years (most often due to prolonged exposure to high-decibel noise) were twice as prone to heart disease than those with normal hearing.</p> <p><strong>2. Air pollution</strong> – Have you been considering a sea or tree change? Now might be the time to do it. Researchers in 2011 discovered that exposure to traffic and air pollution is responsible for between 5 and 7 per cent of heart attacks around the world. Experts believe this may be due to an increase in arterial plaque build-up experienced by city-dwellers.</p> <p><strong>3. Sleep deprivation</strong> – A chronic lack of sleep increases production of adrenaline and cortisol (the stress hormone), which in turn increases your heart rate and blood pressure. In fact, one study found those who regularly had less than five hours of sleep were three times more at risk of heart attack than those who got between six and eight hours.</p> <p><strong>4. Excessive exercise</strong> – Believe it or not, but exercise could be putting you at risk of a heart attack – that is, if you’re doing too much vigorous exercise too often. Anything that causes strain can lead to dangerously high blood pressure – this means weightlifting and endurance sports (e.g. marathons) could be off the table. Stick to low-impact workouts like brisk walking, light weights and yoga.</p> <p><strong>5. Too much sitting</strong> – We’ve heard it all before – that sitting is bad for you – but you might not have realised just how bad it can be. According to a 2015 report, the average adult spends more than half of their waking hours sitting down, making them more likely to suffer or die from heart disease –even those who exercised an hour a day couldn’t combat this higher risk.</p> <p><em>Images: Getty</em></p>

Body

Embrace grey hair with our simple healthy hair tips

<p>While in the past going grey may have been seen as a negative of the ageing process, today women are embracing this as a stamp of wisdom. And why not? It’s en vogue and can look really attractive too. Thank goodness the days of “having” to hide your natural colour are gone! But just because you’re going natural, doesn’t mean there’s no effort involved. Knowing how to care for and style your grey locks is key and can make all the difference between “stylish and sixty-plus” and “stuffy and sixty-plus”. Read on for our top tips and tricks for healthy, happy hair.</p> <p><strong>Focus on your cut</strong> – A great cut is essential for any hair colour but especially for grey hair. Chances are good that you may have been dyeing your hair in the months/years leading up to embracing grey… so a decent chop may increase the health and vitality of your locks. Speak to your hairdresser about a style that suits both your face shape and lifestyle.</p> <p><strong>Swap your shampoo</strong> – Grey hair is far more prone to breakage and can also become quite dry and coarse. Ensuring that you’re using a moisturising shampoo at every wash can help keep strands in good condition.</p> <p><strong>Condition well</strong> – If you’ve been wary of conditioner in the past due to your hair being on the oily side, now is the time to become friendly again. Conditioning with a moisturising formula is essential after every shampoo. If you’re still nervous about hair becoming oily, you can try a shampoo for “normal” hair, which will nourish without weighing hair down.</p> <p><strong>Treat yourself to an at-home treatment</strong> – Once a fortnight, treat your hair with a shampoo specifically formulated for grey hair. After washing and conditioning, apply a clear colour glaze or gloss which is designed to coat the cuticle, boosting shine and general vitality.</p> <p><strong>Take care when styling</strong> – As it’s prone to dryness and breakage, applying a thermal protectant to your hair before heat styling is a great way to prevent damage from occurring. Simply comb through hair and style as normal. It’s also a good idea to try and have a day or two off a week from using your hairdryer/hot implements to give hair a good break.</p> <p><em>Images: Getty</em></p>

Beauty & Style

Arctic Ocean could be ice-free in summer by 2030s, say scientists – this would have global, damaging and dangerous consequences

<p><a href="https://theconversation.com/profiles/jonathan-bamber-102567">Jonathan Bamber</a>, <em><a href="https://theconversation.com/institutions/university-of-bristol-1211">University of Bristol</a></em></p> <p>The Arctic Ocean could be ice-free in summer by the 2030s, even if we do a good job of reducing emissions between now and then. That’s the worrying conclusion of a new study in <a href="https://www.nature.com/articles/s41467-023-38511-8">Nature Communications</a>.</p> <p>Predictions of an ice-free Arctic Ocean have a long and complicated history, and the 2030s is sooner than most scientists had thought possible (though it is later than some had wrongly forecast). What we know for sure is the disappearance of sea ice at the top of the world would not only be an emblematic sign of climate breakdown, but it would have global, damaging and dangerous consequences.</p> <p>The Arctic has been experiencing climate heating <a href="https://theconversation.com/arctic-is-warming-nearly-four-times-faster-than-the-rest-of-the-world-new-research-188474">faster than any other part of the planet</a>. As it is at the frontline of climate change, the eyes of many scientists and local indigenous people have been on the sea ice that covers much of the Arctic Ocean in winter. This thin film of frozen seawater expands and contracts with the seasons, reaching a minimum area in September each year.</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/530136/original/file-20230605-19-mdh85y.gif?ixlib=rb-1.1.0&q=45&auto=format&w=1000&fit=clip"><img src="https://images.theconversation.com/files/530136/original/file-20230605-19-mdh85y.gif?ixlib=rb-1.1.0&q=45&auto=format&w=754&fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/530136/original/file-20230605-19-mdh85y.gif?ixlib=rb-1.1.0&q=45&auto=format&w=600&h=184&fit=crop&dpr=1 600w, https://images.theconversation.com/files/530136/original/file-20230605-19-mdh85y.gif?ixlib=rb-1.1.0&q=30&auto=format&w=600&h=184&fit=crop&dpr=2 1200w, https://images.theconversation.com/files/530136/original/file-20230605-19-mdh85y.gif?ixlib=rb-1.1.0&q=15&auto=format&w=600&h=184&fit=crop&dpr=3 1800w, https://images.theconversation.com/files/530136/original/file-20230605-19-mdh85y.gif?ixlib=rb-1.1.0&q=45&auto=format&w=754&h=232&fit=crop&dpr=1 754w, https://images.theconversation.com/files/530136/original/file-20230605-19-mdh85y.gif?ixlib=rb-1.1.0&q=30&auto=format&w=754&h=232&fit=crop&dpr=2 1508w, https://images.theconversation.com/files/530136/original/file-20230605-19-mdh85y.gif?ixlib=rb-1.1.0&q=15&auto=format&w=754&h=232&fit=crop&dpr=3 2262w" alt="Animation of Arctic sea ice from space" /></a><figcaption><span class="caption">Arctic sea ice grows until March and then shrinks until September.</span> <span class="attribution"><a class="source" href="https://www.nasa.gov/feature/esnt/2022/nasa-finds-2022-arctic-winter-sea-ice-10th-lowest-on-record">NASA</a></span></figcaption></figure> <p>The ice which remains at the end of summer is called multiyear sea ice and is considerably thicker than its seasonal counterpart. It acts as barrier to the transfer of both moisture and heat between the ocean and atmosphere. Over the past 40 years this multiyear sea ice has shrunk from around <a href="http://polarportal.dk/en/sea-ice-and-icebergs/sea-ice-extent0/">7 million sq km to 4 million</a>. That is a loss equivalent to roughly the size of India or 12 UKs. In other words, it’s a big signal, one of the most stark and dramatic signs of fundamental change to the climate system anywhere in the world.</p> <p>As a consequence, there has been considerable effort invested in determining when the Arctic Ocean might first become ice-free in summer, sometimes called a “blue ocean event” and defined as when the sea ice area drops below 1 million sq kms. This threshold is used mainly because older, thicker ice along parts of Canada and northern Greenland is expected to remain long after the rest of the Arctic Ocean is ice-free. We can’t put an exact date on the last blue ocean event, but one in the near future would likely mean open water at the North Pole for the first time in <a href="https://www.nature.com/articles/nature10581">thousands of years</a>.</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/530138/original/file-20230605-29-9uuhxu.png?ixlib=rb-1.1.0&q=45&auto=format&w=1000&fit=clip"><img src="https://images.theconversation.com/files/530138/original/file-20230605-29-9uuhxu.png?ixlib=rb-1.1.0&q=45&auto=format&w=754&fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/530138/original/file-20230605-29-9uuhxu.png?ixlib=rb-1.1.0&q=45&auto=format&w=600&h=712&fit=crop&dpr=1 600w, https://images.theconversation.com/files/530138/original/file-20230605-29-9uuhxu.png?ixlib=rb-1.1.0&q=30&auto=format&w=600&h=712&fit=crop&dpr=2 1200w, https://images.theconversation.com/files/530138/original/file-20230605-29-9uuhxu.png?ixlib=rb-1.1.0&q=15&auto=format&w=600&h=712&fit=crop&dpr=3 1800w, https://images.theconversation.com/files/530138/original/file-20230605-29-9uuhxu.png?ixlib=rb-1.1.0&q=45&auto=format&w=754&h=895&fit=crop&dpr=1 754w, https://images.theconversation.com/files/530138/original/file-20230605-29-9uuhxu.png?ixlib=rb-1.1.0&q=30&auto=format&w=754&h=895&fit=crop&dpr=2 1508w, https://images.theconversation.com/files/530138/original/file-20230605-29-9uuhxu.png?ixlib=rb-1.1.0&q=15&auto=format&w=754&h=895&fit=crop&dpr=3 2262w" alt="Annotated map of Arctic" /></a><figcaption><span class="caption">The thickest ice (highlighted in pink) is likely to remain even if the North Pole is ice-free.</span> <span class="attribution"><a class="source" href="https://nsidc.org/arcticseaicenews/2015/05/new-tools-for-sea-ice-thickness/">NERC Center for Polar Observation and Modelling</a>, <a class="license" href="http://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA</a></span></figcaption></figure> <p>One problem with predicting when this might occur is that sea ice is notoriously difficult to model because it is influenced by both atmospheric and oceanic circulation as well as the flow of heat between these two parts of the climate system. That means that the climate models – powerful computer programs used to simulate the environment – need to get all of these components right to be able to accurately predict changes in sea ice extent.</p> <h2>Melting faster than models predicted</h2> <p>Back in the 2000s, an assessment of early generations of climate models found they generally <a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2007GL029703">underpredicted the loss of sea ice</a> when compared to satellite data showing what actually happened. The models predicted a loss of about 2.5% per decade, while the observations were closer to 8%.</p> <p>The next generation of models did better but were <a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2012GL052676">still not matching observations</a> which, at that time were suggesting a blue ocean event would happen by mid-century. Indeed, the latest <a href="https://www.ipcc.ch/report/sixth-assessment-report-working-group-i/">IPCC climate science report</a>, published in 2021, reaches a similar conclusion about the timing of an ice-free Arctic Ocean.</p> <p>As a consequence of the problems with the climate models, some scientists have attempted to extrapolate the observational record resulting in the controversial and, ultimately, incorrect assertion that this would happen <a href="https://www.theguardian.com/environment/2016/aug/21/arctic-will-be-ice-free-in-summer-next-year">during the mid 2010s</a>. This did not help the credibility of the scientific community and its ability to make reliable projections.</p> <h2>Ice-free by 2030?</h2> <p>The scientists behind the latest study have taken a different approach by, in effect, calibrating the models with the observations and then using this calibrated solution to project sea ice decline. This makes a lot of sense, because it reduces the effect of small biases in the climate models that can in turn bias the sea ice projections. They call these “observationally constrained” projections and find that the Arctic could become ice-free in summer as early as 2030, even if we do a good job of reducing emissions between now and then.</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/530365/original/file-20230606-21-usmovg.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=1000&fit=clip"><img src="https://images.theconversation.com/files/530365/original/file-20230606-21-usmovg.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=754&fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/530365/original/file-20230606-21-usmovg.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=600&h=394&fit=crop&dpr=1 600w, https://images.theconversation.com/files/530365/original/file-20230606-21-usmovg.jpg?ixlib=rb-1.1.0&q=30&auto=format&w=600&h=394&fit=crop&dpr=2 1200w, https://images.theconversation.com/files/530365/original/file-20230606-21-usmovg.jpg?ixlib=rb-1.1.0&q=15&auto=format&w=600&h=394&fit=crop&dpr=3 1800w, https://images.theconversation.com/files/530365/original/file-20230606-21-usmovg.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=754&h=495&fit=crop&dpr=1 754w, https://images.theconversation.com/files/530365/original/file-20230606-21-usmovg.jpg?ixlib=rb-1.1.0&q=30&auto=format&w=754&h=495&fit=crop&dpr=2 1508w, https://images.theconversation.com/files/530365/original/file-20230606-21-usmovg.jpg?ixlib=rb-1.1.0&q=15&auto=format&w=754&h=495&fit=crop&dpr=3 2262w" alt="Walruses on ice floe" /></a><figcaption><span class="caption">Walruses depend on sea ice. As it melts, they’re being forced onto land.</span> <span class="attribution">outdoorsman / shutterstock</span></figcaption></figure> <p>There is still plenty of uncertainty around the exact date – about <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016GL070067">20 years or so</a> – because of natural chaotic fluctuations in the climate system. But compared to previous research, the new study still brings forward the most likely timing of a blue ocean event by about a decade.</p> <h2>Why this matters</h2> <p>You might be asking the question: so what? Other than some polar bears not being able to hunt in the same way, why does it matter? Perhaps there are even benefits as the previous US secretary of state, Mike Pompeo, <a href="https://edition.cnn.com/2019/05/06/politics/pompeo-sea-ice-arctic-council/index.html">once declared</a> – it means ships from Asia can potentially save around 3,000 miles of journey to European ports in summer at least.</p> <p>But Arctic sea ice is an important component of the climate system. As it dramatically reduces the amount of sunlight absorbed by the ocean, removing this ice is predicted to further accelerate warming, through a process known as a positive feedback. This, in turn, will make the Greenland ice sheet <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014GL059770">melt faster</a>, which is already a major contributor to <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021RG000757">sea level rise</a>.</p> <p>The loss of sea ice in summer would also mean changes in <a href="https://www.ipcc.ch/report/ar6/wg2/chapter/ccp6/">atmospheric circulation and storm tracks</a>, and fundamental shifts in ocean biological activity. These are just some of the <a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021RG000757">highly undesirable consequences</a> and it is fair to say that the disadvantages will far outweigh the slender benefits.</p> <p><a href="https://theconversation.com/profiles/jonathan-bamber-102567">Jonathan Bamber</a>, Professor of Physical Geography, <em><a href="https://theconversation.com/institutions/university-of-bristol-1211">University of Bristol</a></em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/arctic-ocean-could-be-ice-free-in-summer-by-2030s-say-scientists-this-would-have-global-damaging-and-dangerous-consequences-206974">original article</a>.</em></p> <p><em>Images: Getty</em></p>

Travel Trouble

10 best tips for gracefully growing out grey hair

<h2>Pro tips that make going grey so much better</h2> <p>There’s no avoiding it. At some point, you will have to deal with grey hair. Of course, how you deal with it is up to you. Some women start growing out grey hair as soon as it begins to appear. Others begin their journey by pulling out greys and then spend years dyeing it before deciding it’s too much of a hassle to do the constant cover-up. Even if you’ve found the <a href="https://www.readersdigest.com.au/healthsmart/beauty/how-to-find-the-best-hair-colour-for-your-skin-tone" target="_blank" rel="noopener">best hair colour for your skin tone</a>, having to touch up your roots every four to six weeks can get old. No matter what your path is, going grey isn’t for the faint of heart.</p> <p>“Many women find it challenging to grow out grey hair,” says hairstylist Krysta Biancone. “This is because it usually occurs gradually, so the transition from natural hair colour to grey hair is not easy.”</p> <p>But it’s not all doom and gloom when it comes to going grey. In fact, it can be incredibly empowering, liberating and downright gorgeous when you make it to the finish line, and it can even make you look younger. But first, there are a few things you need to know. We asked top hairstylists around the country to divulge their best tips for making this transition as easy as possible.</p> <h2>Add highlights</h2> <p>It might sound counterintuitive, but adding subtle colour can make the transition to grey more seamless. “When you first decide you’re nearly ready to go natural, a step in the right direction would be to start going lighter. That way, the roots grow in a little more gracefully,” says hair stylist and colourist, Kali Ferrara. “This can be done easily by a skilled colourist, with a lighter base colour in conjunction with highlights.”</p> <p>One word of warning: steer clear of warmer colours like reds and strawberry blondes when growing out grey hair. Ferrara says these hues could backfire and show even more contrast with your roots.</p> <h2>Go a little darker</h2> <p>On the flip side, you could choose lowlights. But instead of adding a shade that’s slightly darker (which is normally what you’d do with lowlights), try to match your non-grey hair colour. This will help blend without adding a brand-new shade to the mix. “Lowlights create some contrast and will give hair a more salt-and-pepper look that can be very becoming,” says celebrity hairstylist Gina Rivera. Just be sure not to go darker than your hair colour, says Rivera. Doing so can create too much contrast and bring more attention to the fact that you are transitioning to grey, which won’t look good in photos or in real life.</p> <h2>Chop it off</h2> <p>Ready for a big change? Ferrara recommends growing your roots as long as you possibly can and then getting a super-short haircut to get rid of all the leftover colour. How short you go is totally up to you. A pixie cut can be chic and low-maintenance, but if you’ve never had short hair, that could be too big of a change. A short bob looks good on just about anyone, so that may be your best bet, though a stylist will be able to help you determine just how short will be flattering for your face shape. In general, slimmer faces tend to look great with hair that hits just under the jawbone, while fuller faces may want to go slightly longer (think a few centimetres below the jaw).</p> <p>“While this can be a dramatic change, it can also be just the new look you may be looking for!” Ferrara says. “Think of your natural hair colour as a new adventure – a new, liberated you.”</p> <h2>Cover roots as they grow in</h2> <p>If you’re growing out grey hair but your roots are driving you nuts, there are a few ways you can hide them. One easy solution is to cover them with a headband, hat or chic scarf. Another option is root spray or powder. “These products can mask the roots very effectively,” says master stylist Lorrene Conino. “Just spray the exposed areas after you style your hair.”</p> <p>Just shake the bottle well, hold it about 15 centimetres from your roots and spritz it on. These products offer instant coverage on grey hair without an expensive trip to the salon.</p> <h2>Don’t slack on trims</h2> <p>If you can’t bring yourself to do a big cut, regular haircuts (even little ones!) can help make the process go faster too. Aim for a trim every six to eight weeks. This will help you get rid of split ends and maintain healthy hair during your growing-out period, says hairstylist Nia Jones. After all, she explains, you may as well keep your hair looking as good as possible as you go through this tricky transition. Another bonus? Even if you aren’t getting a drastic cut, snipping a bit each time will get rid of old colour.</p> <h2>Prevent brassiness</h2> <p>As more and more grey starts growing in, make sure those strands look as good as possible. Although grey hair is less vibrant than hair of other colours, it still can become dull and uneven if not properly cared for. Sun exposure, washing hair with water that has a high mineral content, and improper hair care are just a few reasons grey locks can turn brassy. Luckily, there’s a quick fix: using shampoo and conditioner designed specifically for silver or white hair can help tone down brassiness by balancing out the warm undertones, says Biancone.</p> <p>You can also include purple toning products into your maintenance routine. Why purple? To understand how a purple product works, you need to know a bit about colour theory. Essentially, on the colour wheel, purple is opposite of yellow. This means that purple shampoo or toner helps to neutralise unwanted yellow or brassy tones that can come along with greys. Try adding toning drops to your shampoo or conditioner once a week to keep your hair the colour you want it. Taking this small precaution when caring for grey hair can help create luscious-looking locks with longevity.</p> <h2>Go big on moisture</h2> <p>The texture of grey hair is quite different from the hair of your youth. George Papanikolas, a celebrity hairstylist, explains that it’s typically more coarse, frizzy and dehydrated. To combat this, he recommends arming your strands with moisturising products that will keep it silky and shiny.</p> <h2>Don’t try to remove hair dye on your own</h2> <p>Let’s say you’ve been dying your hair to cover up those greys but wish you hadn’t. Well, even if you’ve just been using root touch-up kits as new greys grow in, you should never try to lift or remove hair dye on your own. “Chemicals are typically used to remove colour, and you need to know what you are doing,” warns Rivera. “If you don’t, you could end up really damaging your hair.” If this is a route you’re intent on exploring instead of waiting for the colour to grow out, book an appointment with a professional. Just be aware that removing hair dye is tricky and often takes multiple appointments.</p> <p>For an easier, much gentler option, try using a clarifying shampoo to lighten the dye on your strands, says Jones. These shampoos are formulated to remove excess buildup and give you a deep clean, but they may also help wash away some colour. Just don’t use them more than once a week. These products give hair a deep clean, and using them too often can strip your strands of natural oils that add hydration.</p> <h2>Experiment with new styles</h2> <p>Whether you’re trying to cover up the grey or want to embrace it, Jones suggests playing with different styles outside of the boundaries of your everyday look – ie, a ponytail, a different part that flatters your face shape or a brushed-back style that ‘hides’ roots. Changing things up allows you to play with your style, and it also makes growing out grey hair look cool and intentional. Who says blondes have all the fun?!</p> <p><em>This article originally appeared on <a href="https://www.readersdigest.co.nz/healthsmart/beauty/10-best-tips-for-gracefully-growing-out-grey-hair" target="_blank" rel="noopener">Reader's Digest</a>.</em></p> <p><em>Images: Getty</em></p>

Beauty & Style

8 hair washing tips to transform your tresses this winter

<p dir="ltr">One curly-haired influencer has shared her secrets to happy and healthy hair with the world, promising small changes that “make a big impact” over all. </p> <p dir="ltr">In a video posted to her social media accounts, Jennie - who goes by ‘The Curly Carr’ online - stressed the importance of learning to properly cleanse hair, and the benefits it can have on the likes of “hair health, definition, shine, volume, and growth”.</p> <p dir="ltr">As she explained, she too used to be guilty of just hopping in the shower, quickly slathering her hair in shampoo, and rinsing to get the job done. </p> <p dir="ltr">“I had no clue what I was doing!” she confessed. “Seems like such a small thing, but makes a big impact.”</p> <p dir="ltr">But luckily for Jennie - and anyone else fortunate enough to hear her top tips - she did learn what she should be doing, working her way towards the luscious locks many dream of, before setting out on her mission to help others on their hair journey.</p> <p dir="ltr">And in just eight simple steps, that won’t cost you a fortune in new products, Jennie has shared her findings, as well as some helpful advice to help with the transition from quickfire wash to thorough and effective hair care. </p> <p dir="ltr">Step one was straightforward enough, with Jennie noting that it’s important to “make sure your hair is thoroughly wet all the way through”. According to some experts, a good wetting with warm water helps hair to open up, allowing for a better conditioning process later on. </p> <p dir="ltr">Step two called for emulsifying shampoo in your hands before it goes anywhere near your head. Essentially, rub it between your hands until it froths up - once you’ve got the suds, it’s time to move on to the hair. </p> <p dir="ltr">Step three instructed hair hopefuls to massage their heads. But, as Jennie advised, do it “with the pads of your fingers, don’t use your nails”. Be gentle up there, just like you would be to your face. </p> <p dir="ltr">Step four followed directly on from three, with the instruction to message “all around your head” and to make sure everything got a good clean. Jennie noted that it may take anywhere from 3-5 minutes, but it would all be worth it to have your scalp cleansed. </p> <p dir="ltr">Step five had Jennie calling for the lengths of hair to be remembered, as “it’s not just your scalp getting buildup with products, dirt, and oil”.</p> <p dir="ltr">Step six was to use a <a href="https://www.priceline.com.au/product/189080/lady-jayne-restorative-scalp-brush-silicon-bristles-1ea">shampoo brush/scalp brush</a>, particularly for those who - like Jennie herself - tended to go a few days between washes, or did a pre-shampoo process. </p> <p dir="ltr">Step seven was another one many would be familiar with, as Jennie noted the importance of making sure all shampoo had been thoroughly washed out “before moving on to conditioner!” </p> <p dir="ltr">And last but not least, step eight instructed viewers to listen to their scalps, as they’d know best when it was time for the next all-important wash. </p> <p dir="ltr">“Your hair can always be refreshed,” Jennie explained, “but if your scalp is dry, itchy, and you can see buildup, it’s time to wash!”</p> <blockquote class="instagram-media" style="background: #FFF; border: 0; border-radius: 3px; box-shadow: 0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width: 540px; min-width: 326px; padding: 0; width: calc(100% - 2px);" data-instgrm-captioned="" data-instgrm-permalink="https://www.instagram.com/reel/CnmLyOjKDC1/?utm_source=ig_embed&utm_campaign=loading" data-instgrm-version="14"> <div style="padding: 16px;"> <div style="display: flex; flex-direction: row; align-items: center;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 40px; margin-right: 14px; width: 40px;"> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 100px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 60px;"> </div> </div> </div> <div style="padding: 19% 0;"> </div> <div style="display: block; height: 50px; margin: 0 auto 12px; width: 50px;"> </div> <div style="padding-top: 8px;"> <div style="color: #3897f0; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: 550; line-height: 18px;">View this post on Instagram</div> </div> <div style="padding: 12.5% 0;"> </div> <div style="display: flex; flex-direction: row; margin-bottom: 14px; align-items: center;"> <div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(0px) translateY(7px);"> </div> <div style="background-color: #f4f4f4; height: 12.5px; transform: rotate(-45deg) translateX(3px) translateY(1px); width: 12.5px; flex-grow: 0; margin-right: 14px; margin-left: 2px;"> </div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(9px) translateY(-18px);"> </div> </div> <div style="margin-left: 8px;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 20px; width: 20px;"> </div> <div style="width: 0; height: 0; border-top: 2px solid transparent; border-left: 6px solid #f4f4f4; border-bottom: 2px solid transparent; transform: translateX(16px) translateY(-4px) rotate(30deg);"> </div> </div> <div style="margin-left: auto;"> <div style="width: 0px; border-top: 8px solid #F4F4F4; border-right: 8px solid transparent; transform: translateY(16px);"> </div> <div style="background-color: #f4f4f4; flex-grow: 0; height: 12px; width: 16px; transform: translateY(-4px);"> </div> <div style="width: 0; height: 0; border-top: 8px solid #F4F4F4; border-left: 8px solid transparent; transform: translateY(-4px) translateX(8px);"> </div> </div> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center; margin-bottom: 24px;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 224px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 144px;"> </div> </div> <p style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; line-height: 17px; margin-bottom: 0; margin-top: 8px; overflow: hidden; padding: 8px 0 7px; text-align: center; text-overflow: ellipsis; white-space: nowrap;"><a style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: normal; line-height: 17px; text-decoration: none;" href="https://www.instagram.com/reel/CnmLyOjKDC1/?utm_source=ig_embed&utm_campaign=loading" target="_blank" rel="noopener">A post shared by Jennie 🌷 | Curly Hair Care and Simple Hairstyle Tutorials (@the.curly.carr)</a></p> </div> </blockquote> <p dir="ltr"><em>Images: TikTok</em></p>

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