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Don’t like drinking plain water? 10 healthy ideas for staying hydrated this summer

<a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> and <a href="https://theconversation.com/profiles/emily-burch-438717">Emily Burch</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> Have you heard the saying “water is life?” Well, it’s true. Water is an <a href="https://www.hsph.harvard.edu/nutritionsource/water/">essential nutrient</a>. Our body cannot produce sufficient water to live, so we need to consume water through food and fluids to survive. Maintaining hydration is one of the most fundamental components of good health. But lots of people don’t like drinking plain water much. The good news is there are many other healthy ways to help you stay hydrated. <h2>Why hydration is important</h2> Water is vital for many aspects of body functioning. About half our blood is “blood plasma”, which is over 90% water. Blood plasma is essential for carrying energy, nutrients and oxygen to the cells in the body that need it most. Water helps to remove waste products via the kidneys. It also helps keep joints lubricated, the digestive system functioning, the body’s temperature controlled and skin plump and strong. If you don’t consume enough water, you may experience symptoms of dehydration such as headaches, dizziness, tiredness, low concentration, constipation and a dry mouth. Being severely dehydrated increases the risk of <a href="https://www.kidney.org/atoz/content/kidneystones">kidney stones</a> and <a href="https://www.healthdirect.gov.au/urinary-tract-infection-uti">urinary tract infections</a>. If you feel thirsty, it means your body is already <a href="https://my.clevelandclinic.org/health/treatments/9013-dehydration#:%7E:text=If%20you're%20thirsty%2C%20you,life%2Dthreatening%20illnesses%20like%20heatstroke.">mildly dehydrated</a>, so make sure you pay attention to what your body is telling you. <h2>How much fluid do you need?</h2> The amount of fluid we need changes as we age. Relative to our body weight, our needs decrease. So, a newborn baby has higher fluid needs (per kilogram body weight) than their parent, and older adults have lower fluid needs than younger adults. Fluid requirements are related to metabolic needs and vary from person-to-person. The normal turnover of water in adults is approximately 4% of total body weight per day. So, for example, if you weigh 70 kilograms, you’ll lose about 2.5 to 3 litres of water a day (not including sweating). This means you will need to consume that amount of water from food and drinks to maintain your hydration. Eight cups (or two litres) a day is often <a href="https://www.npr.org/2022/09/21/1124371309/busting-common-hydration-water-myths?utm_source=npr_newsletter&utm_medium=email&utm_content=20221016&utm_term=7386723&utm_campaign=health&utm_id=31926817&orgid=&utm_att1=">mentioned</a> as the amount of water we should aim for and a nice way to track your intake. But it doesn’t account for individual variation based on age, gender, body size and activity levels. Alcohol is a diuretic, which means it dehydrates the body by promoting water loss through urine. This fluid loss is a key factor that contributes to the severity of a hangover. Always have a glass of water in between alcoholic drinks to help stay hydrated. Caffeinated drinks (like tea and coffee) only have a mild diuretic effect. For most healthy adults, it’s okay to consume up to 400 mg of caffeine a day – that’s about four cups of coffee or eight cups of tea. If you drink more than this, it may impact your hydration levels. To check your specific requirements, check out the Australian <a href="https://www.nrv.gov.au/nutrients/water">guidelines</a> for fluid intake. <h2>People who should take extra care</h2> Some people are at greater risk of the harmful health effects from dehydration and need to pay special attention to their fluid intake. The highest priority groups are babies, young kids, pregnant women, and older adults. These groups are at greater risk for many reasons, including relatively higher water needs per kilo of body weight, reduced ability to detect and respond to symptoms of dehydration, and barriers to consuming fluids regularly. Family and friends can play an important role in <a href="https://www.agedcareguide.com.au/information/hydration-for-elderly-people-and-the-dangers-of-dehydration">supporting loved ones</a> to maintain hydration, especially during warm weather. <h2>Ten ideas for keeping fluids up this summer</h2> <ol> <li> Download a water reminder app on your phone This will help keep you on track during the day and give you digital “high fives” when you hit your water goals. </li> <li> Add sugar-free flavouring Try a sugar-free fruit infusion in your water to make it more appealing. Prepare a jug in the refrigerator and infuse it overnight so it’s chilled for you the next day. Fill it up and take it everywhere with you! </li> <li> Add some fresh fruit Add some slices of lime, lemon, berries, pineapple or orange to your water bottle for some natural flavouring. If the bottle is kept in a fridge, the fruit will stay fresh for about three days. </li> <li> Make a jug of iced tea (not the bottled stuff) There are many great sugar-free recipes online. Tea contributes to fluid intake too. For green and black teas, brew in boiling water then cool overnight on the bench before refrigerating. Fruit teas can be made using cold water immediately. </li> <li> Add a dash of cordial to your water A small amount of cordial in your water is a healthier alternative to drinking a sugar-sweetened soft drink or fruit juice. Diet cordials have less added sugar again. </li> <li> Make a fruit ‘slushie’ Combine fresh fruit, ice and water at home in the morning and sip to increase your fluid intake for the day. </li> <li> Buy a soda maker for your home Some people find plain water tastes better with bubbles. Sparkling mineral water is great too, as long as there is no added sugar or sweeteners. </li> <li> Before you eat anything, have a glass of water Make it a rule with yourself to have a glass of water before every snack or meal. </li> <li> Eat water-rich fruits and vegetables Many fruits and vegetables have a high water content. Some of the best include berries, oranges, grapes, carrots, lettuce, cabbage, spinach and melons. Keep a container full of cut-up fruit to snack on in your fridge. </li> <li> Use a water bottle Take it with you during the day and keep it by your bed overnight. </li> </ol> <h2>A tip on water bottles</h2> Water bottles are everywhere and sometimes seem to offer <a href="https://www.refinery29.com/en-au/emotional-support-water-bottle-girlies-tiktok-trend">emotional support</a> as well as hydration. Having a water bottle you enjoy using can go a long way in helping you keep up your fluids during the day. Pay attention to the material of the water bottle and use one that helps you form good habits. Some people prefer metal water bottles as they can keep water cooler for longer (others feel like they are camping). Some prefer glass bottles because the water isn’t affected by any flavours from the container (others fear breaking the glass). Consider the practical aspects, too: Will it fit in your bag? Will it be light enough to carry with you? Can you “chug” on it when you’re exceptionally thirsty? Does the lid require screwing? How durable is it in preventing leaks? Do some <a href="https://www.marthastewart.com/7842071/best-water-bottles-hydration">homework</a> on your water bottle, an essential accessory! <a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, Professor of Community Health and Wellbeing, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> and <a href="https://theconversation.com/profiles/emily-burch-438717">Emily Burch</a>, Dietitian and Researcher, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> Image credits: Shutterstock 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/dont-like-drinking-plain-water-10-healthy-ideas-for-staying-hydrated-this-summer-191859">original article</a>.

Body

What’s the difference between a psychopath and a sociopath? Less than you might think

<a href="https://theconversation.com/profiles/bruce-watt-1486350">Bruce Watt</a>, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> and <a href="https://theconversation.com/profiles/katarina-fritzon-402205">Katarina Fritzon</a>, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> Articles about badly behaved people and how to spot them are common. You don’t have to Google or scroll too much to find headlines such as <a href="https://psychologyeverywhere.com/articles/7-signs-your-boss-is-a-psychopath/">7 signs your boss is a psychopath</a> or <a href="https://www.elephantjournal.com/2022/08/how-to-avoid-the-sociopath-next-door-erica-leibrandt/">How to avoid the sociopath next door</a>. You’ll often see the terms psychopath and sociopath used somewhat interchangeably. That applies to perhaps the most famous badly behaved fictional character of all – Hannibal Lecter, the cannibal serial killer from <a href="https://www.imdb.com/title/tt0102926/">The Silence of the Lambs</a>. In the book on which the movie is based, Lecter is described as a “pure sociopath”. But in the movie, he’s described as a “pure psychopath”. Psychiatrists have diagnosed him with <a href="https://psychiatryonline.org/doi/pdf/10.1176/appi.psychotherapy.2002.56.1.100">something else</a> entirely. So what’s the difference between a psychopath and a sociopath? As we’ll see, these terms have been used at different times in history, and relate to some overlapping concepts. <h2>What’s a psychopath?</h2> Psychopathy has been mentioned in the psychiatric literature <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4059069/#:%7E:text=The%20term%20psychopathy%20comes%20from,which%20literally%20means%20suffering%20soul.">since the 1800s</a>. But the latest edition of the Diagnostic Statistical Manual of Mental Disorders (known colloquially as the DSM) <a href="https://www.psychiatry.org/psychiatrists/practice/dsm">doesn’t list</a> it as a recognised clinical disorder. <a href="https://www.psychiatry.org/psychiatrists/practice/dsm/about-dsm/history-of-the-dsm#section_5">Since the 1950s</a>, labels have changed and terms such as “sociopathic personality disturbance” have been replaced with <a href="https://www.ncbi.nlm.nih.gov/books/NBK546673/">antisocial personality disorder</a>, which is what we have today. Someone with antisocial personality disorder has a persistent disregard for the rights of others. This includes breaking the law, repeated lying, impulsive behaviour, getting into fights, disregarding safety, irresponsible behaviours, and indifference to the consequences of their actions. To add to the confusion, the section in the DSM on antisocial personality disorder mentions psychopathy (and sociopathy) traits. In other words, according to the DSM the traits are part of antisocial personality disorder but are not mental disorders themselves. US psychiatrist <a href="https://psycnet.apa.org/record/2018-37736-001">Hervey Cleckley</a> provided the first formal description of psychopathy traits in his 1941 book <a href="https://gwern.net/doc/psychology/personality/psychopathy/1941-cleckley-maskofsanity.pdf">The Mask of Sanity</a>. He based his description on his clinical observations of nine male patients in a psychiatric hospital. He identified several key characteristics, including superficial charm, unreliability and a lack of remorse or shame. <a href="https://psych.ubc.ca/profile/robert-hare/">Canadian psychologist</a> Professor <a href="http://www.hare.org/">Robert Hare</a> refined these characteristics by emphasising interpersonal, emotional and lifestyle characteristics, in addition to the antisocial behaviours listed in the DSM. When we draw together all these strands of evidence, we can say a psychopath manipulates others, shows superficial charm, is grandiose and is persistently deceptive. Emotional traits include a lack of emotion and empathy, indifference to the suffering of others, and not accepting responsibility for how their behaviour impacts others. Finally, a psychopath is easily bored, sponges off others, lacks goals, and is persistently irresponsible in their actions. <h2>So how about a sociopath?</h2> The term sociopath first appeared <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4059069/#:%7E:text=The%20term%20psychopathy%20comes%20from,which%20literally%20means%20suffering%20soul.">in the 1930s</a>, and was attributed to US psychologist George Partridge. He <a href="https://psychiatryonline.org/doi/abs/10.1176/ajp.85.6.1053?journalCode=ajp">emphasised</a> the societal consequences of behaviour that habitually violates the rights of others. Academics and clinicians often used the terms sociopath and psychopath interchangeably. But some <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4059069/#:%7E:text=The%20term%20psychopathy%20comes%20from,which%20literally%20means%20suffering%20soul.">preferred the term sociopath</a> because they said the public sometimes confused the word psychopath with psychosis. “Sociopathic personality disturbance” <a href="https://www.turkpsikiyatri.org/arsiv/dsm-1952.pdf">was the term</a> used in the first edition of the DSM in 1952. This aligned with the <a href="https://journals.sagepub.com/doi/epdf/10.1177/0306624X01453005">prevailing views</a> at the time that antisocial behaviours were largely the product of the social environment, and that behaviours were only judged as deviant if they broke social, legal, and/or cultural rules. Some of these early descriptions of sociopathy are more aligned with what we now call antisocial personality disorder. Others relate to emotional characteristics similar to Cleckley’s 1941 <a href="https://pubmed.ncbi.nlm.nih.gov/26618655/">definition</a> of a psychopath. In short, different people had different ideas about sociopathy and, even today, sociopathy is less-well defined than psychopathy. So there is no single definition of sociopathy we can give you, even today. But in general, its antisocial behaviours can be similar to ones we see with psychopathy. Over the decades, the term sociopathy fell out of favour. From the late 60s, psychiatrists used the term antisocial personality disorder instead. <h2>Born or made?</h2> Both “sociopathy” (what we now call antisocial personality disorder) and psychopathy have been associated with a wide range of developmental, biological and psychological causes. For example, people with psychopathic traits have <a href="https://www.theguardian.com/science/2013/may/12/how-to-spot-a-murderers-brain">certain brain differences</a> especially <a href="https://psycnet.apa.org/record/2006-01001-014">in regions</a> associated with emotions, inhibition of behaviour and problem solving. They also appear to have differences associated with their <a href="https://www.psypost.org/psychopathic-women-exhibit-low-cardiac-defense-responses-study-finds/">nervous system</a>, including a <a href="https://www.sciencedirect.com/science/article/pii/S0301051123001345?via%3Dihub">reduced heart rate</a>. However, sociopathy and its antisocial behaviours are a product of someone’s social environment, and tends to <a href="https://www.aic.gov.au/sites/default/files/2020-05/19-1415-FinalReport.pdf">run in families</a>. These behaviours has been <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4801766/#:%7E:text=Childhood%20abuse%20is%20a%20risk,and%20psychopathic%20traits%20remain%20unclear">associated with</a> physical abuse and parental conflict. <h2>What are the consequences?</h2> Despite their fictional portrayals – such as Hannibal Lecter in Silence of the Lambs or Villanelle in the TV series <a href="https://www.imdb.com/title/tt7016936/">Killing Eve</a> – <a href="https://www.psychologytoday.com/au/blog/making-evil/201902/what-we-get-wrong-about-psychopaths#:%7E:text=Most%20psychopaths%20are%20not%20offenders,extreme%20violence%20or%20serial%20killing.">not all people</a> with psychopathy or sociopathy traits are serial killers or are physically violent. But psychopathy <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4059069/">predicts</a> a wide range of harmful behaviours. In the criminal justice system, psychopathy is strongly linked with re-offending, particularly of a violent nature. In the general population, psychopathy is <a href="https://www.sciencedirect.com/science/article/abs/pii/S0160252709000028?casa_token=5lSd35qRO7oAAAAA:CTu-KkDXxsoYEPvpceItex9go1Fn_YlfBQSW9O9_MwNEX6NxlZ23GRcWnS5YYV_kAig24E4Ahdj7">associated with</a> drug dependence, homelessness, and other personality disorders. Some research even showed psychopathy predicted <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8250605/">failure to follow</a> COVID restrictions. But sociopathy is less established as a key risk factor in identifying people at heightened risk of harm to others. And sociopathy is not a reliable indicator of future antisocial behaviour. <h2>In a nutshell</h2> Neither psychopathy nor sociopathy are classed as mental disorders in formal psychiatric diagnostic manuals. They are both personality traits that relate to antisocial behaviours and are associated with certain interpersonal, emotional and lifestyle characteristics. Psychopathy is thought to have genetic, biological and psychological bases that places someone at greater risk of violating other people’s rights. But sociopathy is less clearly defined and its antisocial behaviours are the product of someone’s social environment. Of the two, psychopathy has the greatest use in identifying someone who is most likely to cause damage to others.<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/226714/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <a href="https://theconversation.com/profiles/bruce-watt-1486350">Bruce Watt</a>, Associate Professor in Psychology, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> and <a href="https://theconversation.com/profiles/katarina-fritzon-402205">Katarina Fritzon</a>, Associate Professor of Psychology, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> Image credits: Shutterstock 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/whats-the-difference-between-a-psychopath-and-a-sociopath-less-than-you-might-think-226714">original article</a>.

Mind

Crowds, water guns and protests: could ‘slow tourism’ be the answer to an overtourism backlash?

<a href="https://theconversation.com/profiles/amy-errmann-1360032">Amy Errmann</a>, <a href="https://theconversation.com/institutions/auckland-university-of-technology-1137">Auckland University of Technology</a> With overtourism in the spotlight as the travel industry continues to rebound after the pandemic, popular destinations around the world are feeling the strain. Bali is overwhelmed by <a href="https://thebalisun.com/concerns-increasing-about-impact-of-trash-and-traffic-on-bali-tourists/">waste and traffic</a>, Australia’s sacred sites have suffered <a href="https://www.bbc.com/news/world-australia-50151344">environmental damage</a>, New York is facing rising rents <a href="https://www.theguardian.com/us-news/2023/oct/23/new-york-airbnb-crackdown-rules-housing">due to short-term rentals</a>, and Singapore’s scenic spots are becoming <a href="https://www.channelnewsasia.com/singapore/overtourism-locals-tourists-sustainable-tourism-stb-focus-4517681">clogged with crowds</a>. Frustrated locals are pushing back – from <a href="https://www.nzherald.co.nz/travel/barcelona-locals-spray-tourists-with-water-guns-during-protest-over-housing-costs/FUFHXKO5X5F5NNPSU6ELNVGSIA/">spraying water at tourists </a>in Barcelona to <a href="https://adventure.com/venice-locals-squatting-against-overtourism-photography/">organising protests in Venice</a>. As the northern hemisphere high season ends, Aotearoa New Zealand is preparing for an influx of visitors ahead of its summer tourism season. And much like those other <a href="https://www.nytimes.com/2024/09/08/world/europe/greece-cruise-ships-tourists-islands.html">tourist hotspots</a>, the government is looking at how to manage the negative effects of tourism on local communities and the environment. This includes tripling the <a href="https://www.theguardian.com/world/article/2024/sep/04/new-zealand-to-nearly-triple-tourist-tax-for-international-visitors">international tourist tax</a> from NZ$35 to $100. The aim of the increase is to <a href="https://www.theguardian.com/world/2022/aug/11/new-zealand-tourism-minister-makes-pitch-to-the-rich-as-he-spurns-10-a-day-travellers">attract tourists</a> who are more mindful of their impact and willing to contribute to its mitigation, while also <a href="https://theconversation.com/welcome-to-nz-now-pay-up-the-risks-and-rewards-of-raising-the-foreign-tourist-tax-232138">reducing visitor numbers</a> to protect the country’s unique landscapes and cultures. But are there other ways the tourism industry can evolve to ensure benefits for both travellers and the communities they are visiting? So called “slow travel” could be the answer. <h2>Hunting the perfect photo</h2> Overtourism isn’t just about too many people in one place. It’s also about how people travel. <a href="https://edition.cnn.com/travel/social-media-tourism-effect-scn-wellness/index.html">Instagram-famous</a> landmarks draw massive crowds, <a href="https://www.rnz.co.nz/news/national/406195/visitors-ignore-ban-continue-to-visit-mermaid-pools-in-northland-hapu">disrupting local life</a> and sometimes even <a href="https://www.nzherald.co.nz/travel/vermot-town-famous-for-fall-foliage-bans-instagram-tourists-from-streets/BHKEYKKUTNHORFT6QCZ5TW333A/#google_vignette">leading to closures</a>. Travellers often pack their itineraries with as many sights as possible, racing from one place to another in a frenzy to capture the perfect photo. This hurried approach not only creates <a href="https://www.cntraveler.com/galleries/2015-06-19/barcelona-bhutan-places-that-limit-tourist-numbers">congestion</a> but also limits <a href="https://www.nature.com/articles/s41599-024-02859-z">meaningful engagement with the destination</a>. And it’s not just a numbers game. The way tourists behave also plays a critical role. A <a href="https://www.rnz.co.nz/national/programmes/ninetonoon/audio/2018690535/tropical-trash-the-impact-of-holidaying-in-the-pacific">2019 report</a> from the United Nations raised concerns about trash from tourists in developing small island states, including the Pacific Islands. According to the report, a tourist visiting these communities produced about 7kg of waste a day, compared to about 2.5kg produced by a local. The issue is not necessarily about travelling less, but about <a href="https://www.sciencedirect.com/science/article/pii/S2211973623000284">travelling more responsibly</a>. The tourism industry needs to be encouraging travel habits that allow both visitors and locals to enjoy tourism without compromising the integrity of the destination. <h2>The rise of slow travel</h2> Mindfulness – being fully present in the moment – has gained popularity since the 1970s. The concept has influenced a number of sectors, including <a href="https://slowfoodauckland.co.nz/">slow food</a>, <a href="https://ourwayoflife.co.nz/slow-fashion-101-what-to-buy-and-what-to-avoid-to-reduce-your-clothing-footprint/">slow fashion</a>, and now <a href="https://www.lakewanaka.co.nz/wanaka-stories/how-to-be-a-slow-mindful-traveler-in-wanaka/">slow travel</a>. It’s about <a href="https://link.springer.com/chapter/10.1007/978-3-031-63569-4_44#:%7E:text=Slow%20travel%2C%20mindful%20travel%2C%20or,spiritual%20well%2Dbeing%20of%20people">experiencing destinations</a> at a relaxed pace, focusing on deeper connections with local cultures and sustainability. This often means <a href="https://guestnewzealand.com/about-us/eco-travels-new-zealand/">staying longer in fewer places</a> and choosing eco-friendly transport. Understanding slow travel and mindfulness is important because they create <a href="https://www.forbes.com/sites/rogersands/2024/06/08/the-beauty-of-slow-travel/">richer, more memorable experiences</a>. Fast, <a href="https://www.sciencedirect.com/science/article/pii/S0261517724000487">hectic travel</a> often leaves little positive impact. Slow immersive travel, on the other hand, fosters lasting memories and reduces overtourism, pollution and cultural damage. <a href="https://www.tandfonline.com/doi/full/10.1080/00913367.2024.2325144">Research</a> shows when we consciously immerse ourselves in our surroundings we can have more meaningful experiences. Surprisingly, <a href="https://www.sciencedirect.com/science/article/pii/S0261517724000487">even luxury travel</a> – often dismissed as wasteful – can encourage respect and mindfulness for those who invest financially and mentally in their journey, unlike cheaper, mainstream tourism. Activities such as “<a href="https://www.sciencedirect.com/science/article/pii/S2666957921000197">forest bathing</a>”, <a href="https://www.visitutah.com/articles/mindful-hiking">hiking</a> or engaging with <a href="https://www.outofyourcomfortzone.net/a-guide-to-slow-travel-immersing-yourself-in-local-cultures/">local cultures</a> <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6723984/">boost wellbeing and meaning</a>, going beyond just “taking a photo for likes”. This mindful approach can <a href="https://www.sciencedirect.com/science/article/pii/S0160738321001419">change our behaviour on a personal level</a>. By focusing attention on fewer experiences, <a href="https://www.tandfonline.com/doi/full/10.1080/00913367.2024.2325144">travellers can heighten</a> their sense of awe and appreciation, making the travel more memorable. This idea is evident in “<a href="https://journals.sagepub.com/doi/abs/10.1177/002216786200200102?casa_token=PrIQTkCMjx0AAAAA:wtswfg0cuEuQec0zVg-Mbf9MuXYoqhQkWbaQCGdjxWkYUpVOwBu8Op5jC6V4nOghnow3xpwN3fDn">peak experiences</a>”. Disney, for example, creates <a href="https://ideaexchange.uakron.edu/docam/vol9/iss2/6/">emotionally-charged moments</a> that stick in visitors’ minds. Other experiences, such as “<a href="https://journals.sagepub.com/doi/full/10.1177/14614448211072808">digital detoxes</a>” or <a href="https://academic.oup.com/jcr/article-abstract/45/6/1142/4999270">pilgrimages</a> can leave a contemplative impression. By concentrating on a single aspect of a visit, it <a href="https://www.sciencedirect.com/science/article/pii/S0160738320300797?casa_token=Np4PXLk5RqsAAAAA:Q3440A-lsf-XTAWuboPPbIcnvBAhk8nnIoWyF-gynHkSPmyPaykzfpBhTLbFDBHZEX0bbtZJgQ">becomes special and memorable</a>. Even in busy places like Disneyland, focusing on one unique element can make the experience feel slower and more meaningful. <h2>The sustainability of tourism</h2> In the <a href="https://www.sciencedirect.com/science/article/pii/S0261517724000487">Faroe Islands</a>, slow travel helps protect local traditions and landscapes by encouraging thoughtful visitor behaviour, such as using local guides to minimise environmental impact. New Zealand can leverage its natural beauty to offer similar immersive experiences. <a href="https://www.nzherald.co.nz/travel/travel-well-what-is-mindful-hiking-walking-for-wellbeing-boost/67MYS6ZSNXC7ZH6OTZ2DLBGFL4/">Tramping</a> (hiking), for example, can promote a mindful connection with the environment. But even here, there needs to be a focus on balancing tourism with preservation. Popular spots, such as the Department of Conservation huts and the Te Araroa Trail, are <a href="https://www.wildernessmag.co.nz/te-araroa-trail-shows-pressure/">already becoming crowded</a>. It is essential to educate visitors on <a href="https://www.mpi.govt.nz/outdoor-activities/tramping-tips-to-prevent-spreading-pests-and-diseases/biosecurity-considerations-walking-and-tramping/">responsible practices</a> – such as cleaning equipment – to ensure they understand their <a href="https://www.doc.govt.nz/heritage-and-visitor-strategy#:%7E:text=The%20natural%2C%20cultural%20and%20historic,wellbeing%2C%20enabling%20communities%20to%20thrive.">role in protecting nature</a>. Travel that fosters a deeper appreciation for local cultures and environments benefits both visitors and the destinations they explore. The challenge is finding the right balance – encouraging meaningful travel experiences while still ensuring accessibility for all.<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/238316/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <a href="https://theconversation.com/profiles/amy-errmann-1360032">Amy Errmann</a>, Senior Lecturer, Marketing & International Business, <a href="https://theconversation.com/institutions/auckland-university-of-technology-1137">Auckland University of Technology</a> Image credits: Shutterstock 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/crowds-water-guns-and-protests-could-slow-tourism-be-the-answer-to-an-overtourism-backlash-238316">original article</a>.

Travel Trouble

Rare coin hidden for decades to fetch eye-watering sum

Three sisters from the US who inherited a dime coin kept it in a bank vault for more than 40 years, and while they know it had some value, they didn't know just how much until a few years ago. The rare coin, struck by the US Mint in San Francisco in 1975, could be worth more than $US500,000 ($748,000), according to Ian Russell, president of GreatCollections, the auction house selling the coin. What makes the coin depicting President Franklin D. Roosevelt so valuable is that it is just one of two coins missing the "S" mint mark for San Francisco. The other dime sold for $US682,000 (over $1 million) at a 2019 auction and then again months later to a private collector. While avid coin collectors have known about the existence of these two extraordinarily rare coins, their whereabouts had remained a mystery since the late 1970s. “They were hidden for decades,” Russell said. “Most major collectors and dealers have never seen one.” The three sisters from Ohio, who want to remain anonymous, inherited one of the two dimes after the recent death of their of their brother, Russell said. They told Russell that their brother and mother bought the first error coin discovered in 1978 for $27,225, which would amount to roughly $135,000 today. Their parents, who ran a dairy farm, saw the coin as a financial safety net, and it was only until last year that one of the sisters saw the coin first-hand. Russell also said that their brother had reached out to him about seven years ago and told him about the coin, but he too kept it a secret. When Russell told one of the sisters about the potential value of the coin, she told him: “is that really possible?”. The coin, known as the “1975 ‘no S’ proof dime,” will be displayed at a coin show beginning on Wednesday in Tampa, Florida, and before <a href="https://www.greatcollections.com/Coin/1655587" target="_blank" rel="noopener">the auction</a> closes late next month, Russell said. The current highest bidder has offered $US250,000 ($374,000). Images: Great Collections/ Professional Coin Grading Services

Money & Banking

Is still water better for you than sparkling water?

<a href="https://theconversation.com/profiles/christian-moro-121754">Christian Moro</a>, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> and <a href="https://theconversation.com/profiles/charlotte-phelps-1187658">Charlotte Phelps</a>, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> Still or sparkling? It’s a question you’ll commonly hear in a café or restaurant and you probably have a preference. But is there any difference for your health? If you love the fizz, here’s why you don’t have to pass on the sparkling water. <h2>What makes my water sparkle?</h2> This article specifically focuses on comparing still filtered water to carbonated filtered water (called “sparkling water” or “unflavoured seltzer”). Soda water, mineral water, tonic water and flavoured water are similar, but not the same product. The bubbles in sparkling water are created by adding carbon dioxide to filtered water. It reacts to produce carbonic acid, which makes sparkling water more acidic (a pH of <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5747581/">about 3.5</a>) than still (closer to neutral, with a pH around 6.5-8.5). <h2>Which drink is healthiest?</h2> Water is the best way to hydrate our bodies. Research shows when it comes to <a href="https://pubmed.ncbi.nlm.nih.gov/26702122/">hydration</a>, still and sparkling water are <a href="https://www.jstage.jst.go.jp/article/jnsv/58/5/58_333/_article">equally effective</a>. Some people believe water is healthier when it comes from a sealed bottle. But in Australia, tap water is <a href="https://www.waterquality.gov.au/guidelines/drinking-water">monitored very carefully</a>. Unlike bottled water, it also has the added benefit of fluoride, which can help protect young children against <a href="https://linkinghub.elsevier.com/retrieve/pii/S0002-8177(14)60225-7">tooth decay</a> and cavities. Sparkling or still water is always <a href="https://pubmed.ncbi.nlm.nih.gov/30354445/">better</a> than artificially sweetened flavoured drinks or juices. <h2>Isn’t soda water bad for my teeth and bones?</h2> There’s no evidence sparkling water damages your bones. While drinking a lot of soft drinks is linked to increased <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7071508/">fractures</a>, this is largely due to their association with higher rates of obesity. Sparkling water is more acidic than still water, and acidity can soften the teeth’s <a href="https://pubmed.ncbi.nlm.nih.gov/35635779/">enamel</a>. Usually this is not something to be too worried about, unless it is mixed with sugar or citrus, which has much higher levels of acidity and can harm teeth. However, if you grind your teeth often, the softening could enhance the <a href="https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/teeth-grinding#risk-factors-for-tooth-grinding">damage it causes</a>. If you’re undertaking a home whitening process, sparkling water <a href="https://pubmed.ncbi.nlm.nih.gov/39123328/">might discolour</a> your teeth. In most other cases, it would take a lot of sparkling water to pass by the teeth, for a long period of time, to cause any noticeable damage. <h2>How does drinking water affect digestion?</h2> There is a <a href="https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/digestion/faq-20058348">misconception</a> drinking water (of any kind) with a meal is bad for digestion. While theoretically water could dilute stomach acid (which breaks down food), the practice of drinking it doesn’t appear <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11045127/">to have any negative effect</a>. Your digestive system simply adapts to the consistency of the meal. Some people do find that carbonated beverages cause some stomach upset. This is due to the build-up of <a href="https://www.sciencedirect.com/science/article/pii/S0939475309000787">gases</a>, which can cause bloating, cramping and discomfort. For people with an <a href="https://www.nature.com/articles/s41598-023-44916-8">overactive bladder</a>, the acidity might also aggravate the <a href="https://journals.physiology.org/doi/full/10.1152/ajpcell.00441.2022">urinary</a> system. Interestingly, the fizzy “<a href="https://pubmed.ncbi.nlm.nih.gov/34399552/">buzz</a>” you feel in your mouth from sparkling water fades the more you drink it. <h2>Is cold water harder to digest?</h2> You’ve chosen still or sparkling water. What about its temperature? There are surprisingly few studies about the effect of drinking cold water compared to room temperature. There is some evidence colder water (at two degrees Celsius) might inhibit <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7000532/">gastric contractions</a> and slow down digestion. Ice water may constrict blood vessels and cause <a href="https://www.sciencedirect.com/science/article/abs/pii/0306362383900642">cramping</a>. However other research suggests drinking cold water might temporarily boost <a href="https://academic.oup.com/jcem/article/88/12/6015/2661518">metabolism</a>, as the body needs to expend energy to warm it up to body temperature. This effect is minimal and unlikely to lead to significant <a href="https://academic.oup.com/jcem/article/91/9/3598/2656772">weight loss</a>. <h2>Which water wins?</h2> The bottom line is water is essential, hydrates us and has countless other <a href="https://news.com.au/lifestyle/health/diet/fewer-than-25-per-cent-simple-question-most-aussies-cant-answer/news-story/04693f23f03d9e8b6483cf34b47d9fcb">health benefits</a>. Water, with carbonated bubbles or without, will always be the healthiest drink to choose. And if you’re concerned about any impact to teeth enamel, one trick is to follow sparkling water with a glass of still. This helps rinse the teeth and return your mouth’s acidity back to normal.<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/237125/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <a href="https://theconversation.com/profiles/christian-moro-121754">Christian Moro</a>, Associate Professor of Science & Medicine, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> and <a href="https://theconversation.com/profiles/charlotte-phelps-1187658">Charlotte Phelps</a>, Senior Teaching Fellow, Medical Program, <a href="https://theconversation.com/institutions/bond-university-863">Bond University</a> Image credits: Shutterstock 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-still-water-better-for-you-than-sparkling-water-237125">original article</a>.

Food & Wine

Woman “bullied” on plane over budget seating trick

A young woman has recalled a flight from hell when she was “bullied” by a couple who were trying to utilise a seating hack that went viral on TikTok. The solo traveller took to Reddit to recount the story and ask social media users if she was in the wrong for her action. The woman began by saying she usually pays more to select her plane seat ahead of time, but a medical emergency on another plane had her waiting on standby and left with no option other than to sit in a middle seat. When she was finally able to board, she was greeted by a couple who had purchased both the window and aisle seats in a bid to have more space, utilising a travel “trick” that has been popular on TikTok. The method, which has been dubbed the 'poor man's business class', usually leaves travellers with an empty middle seat and more space, and few travellers opt to pick a middle seat. “When I got to my row the man and woman were chatting and sharing a snack... it was obvious they were together. I mentioned to the man that I'm in the middle, and he got up to let me in,” the unsuspecting traveller wrote on Reddit. “I asked them if they would prefer to sit together, I said I was totally okay with that. The woman reacted rudely to this and said ‘you're not supposed to be sitting here anyway’.” After noticing how the plane was full, she offered to show the pair her new ticket with the correct seat number on it. “She flicked her hand at my ticket and made a disgusted sound. I offered again if they wanted to sit together to which she didn't reply, her partner said it's okay and... made some small talk,” she continued. The man’s girlfriend then interrupted their conversation to ask,”'Did you use one of those third party websites to book your flight? It's so frustrating when people cheap out to inconvenience others.” The American woman explained that she had booked her flight directly and she had been placed on standby like everyone else and didn't choose the middle seat - she was assigned it. She then tried to keep the peace by refusing to engage with the furious woman. “I was so done with her attitude, I put my headphones on and attempted to do my own thing,” she explained. But the “entitled” girlfriend wasn't letting it go, as the woman explained, “This woman kept reaching over me and tapping her partner and trying to talk to him in a way that was super intrusive.” “I could tell even her partner was trying to engage her less so that she would hopefully stop, but she didn't.” “I think they tried to pull that tactic where they don't sit together on purpose...hoping no one will sit between them. But on full flights it doesn't work. And even so - it's not the other person's fault.” The traveller's post was met with hundreds of comments slamming the girlfriend’s behaviour, as one person wrote, “It's like a toddler having a tantrum.” “She was disappointed and a total a**hole. Gross entitled people,” another added. Another person applauded the traveller’s level-headed behaviour, writing, “Wow! You are my hero for keeping it classy - I’m afraid I would not have been as kind as you.” Image credits: Shutterstock

Travel Trouble

How much do you need to know about how your spouse spends money? Maybe less than you think

<a href="https://theconversation.com/profiles/scott-rick-1534612">Scott Rick</a>, <a href="https://theconversation.com/institutions/university-of-michigan-1290">University of Michigan</a> Love is in the air, and wedding season is upon us. Like many elder millennials, I grew up watching sitcoms in the 1980s and ‘90s. Whenever those series needed a ratings boost, they would feature a wedding. Those special episodes taught me that weddings usually involve young lovebirds: think Elvin and Sondra from “The Cosby Show,” Cory and Topanga from “Boy Meets World,” or David and Darlene from “Roseanne.” But those were different times. People are getting married later in life than they used to: In the United States, <a href="https://www.census.gov/content/dam/Census/library/visualizations/time-series/demo/families-and-households/ms-2.pdf">the median age of newlyweds</a> has grown to 28 for women and 30 for men. This trend means that many Americans now enter marriage after being self-reliant for several years, including managing their own money. Will they be eager to change that once they get married? Don’t count on it. A 2017 <a href="https://bettermoneyhabits.bankofamerica.com/content/dam/bmh/pdf/ar6vnln9-boa-bmh-millennial-report-winter-2018-final2.pdf">Bank of America survey</a> suggests that millennial married couples are around 15 percentage points more likely than their predecessors to keep their finances separate. This is not necessarily a good development. As a behavioral scientist <a href="https://michiganross.umich.edu/faculty-research/faculty/scott-rick">who studies money and relationships</a>, I find that joint accounts <a href="https://doi.org/10.1093/jcr/ucad020">can bring partners closer</a>. There are some risks, however. Joint accounts create transparency, and intuitively, transparency feels like a good thing in relationships. But I argue that some privacy is important even for highly committed couples – <a href="https://us.macmillan.com/books/9781250280077/tightwadsandspendthrifts">and money is no exception</a>. <h2>The newlywed game</h2> Behavioral scientists <a href="https://kelley.iu.edu/faculty-research/faculty-directory/profile.html?id=jgolson">Jenny Olson</a>, <a href="https://som.yale.edu/faculty-research/faculty-directory/deborah-small">Deb Small</a>, <a href="https://www.kellogg.northwestern.edu/faculty/directory/finkel_eli.aspx">Eli Finkel</a> and I recently conducted <a href="https://academic.oup.com/jcr/article-abstract/50/4/704/7077142">an experiment with engaged and newlywed couples</a>. Each of the pairs had entirely separate accounts, but they were undecided about how they wanted to manage their money moving forward. We randomly assigned each of the 230 couples to one of three groups. One group kept their money in separate accounts; one merged their cash into a joint account and stopped using separate accounts; and one managed their money however they liked. We followed couples for two years, periodically asking them to complete surveys assessing their relationship dynamics and satisfaction. Our relationship quality measure included items such as “I cannot imagine another person making me as happy as my partner does” and “Within the last three months, I shouted or yelled at my partner.” Among the couples who could do whatever they wanted, most kept things separate. They and the couples assigned to keep separate accounts experienced a steady decline in relationship quality over time. This is a fairly typical pattern. For instance, in <a href="https://academic.oup.com/sf/article-abstract/79/4/1313/2234046">a large study that tracked U.S. couples’ marital happiness for 17 years</a>, <a href="https://www.unk.edu/academics/social-work/faculty_staff/van_laningham.php">sociologist Jody Van Laningham</a> and colleagues found that “marital happiness either declines continuously or flattens after a long period of decline.” Declines during the first two years of marriage are particularly important. Social scientist <a href="https://liberalarts.utexas.edu/prc/faculty/hustontl">Ted Huston</a> and colleagues call those first two years <a href="https://doi.org/10.1037/0022-3514.80.2.237">the “connubial crucible</a>.” They find that relationship dynamics that develop during that crucial period can foreshadow relationship quality for many years to come. Couples in our study who were prompted to take the plunge into a joint account, however, maintained their initial level of relationship satisfaction over the course of the two-year experiment. <h2>Tit-for-tat</h2> Our survey results suggest that, by turning “my money” and “your money” into “our money,” a joint account can help to reduce scorekeeping within a relationship. For example, we found that couples with joint accounts were more likely to agree with statements such as “When one person does something for the other, the other should not owe the giver anything.” Relationships usually don’t start with a scorekeeping orientation. In the 1980s and ‘90s, psychologist <a href="https://psychology.yale.edu/people/margaret-clark">Margaret Clark</a> and colleagues conducted experiments where partners had the option of keeping track of each other’s contributions to a shared task. <a href="https://clarkrelationshiplab.yale.edu/sites/default/files/files/Resource%20allocation%20in%20intimate%20relationships.pdf">They observed</a> that intimate relationships often begin with a “communal” orientation, where partners help one another without keeping careful track of who’s doing what. Eventually, however, they take on more of an “exchange” orientation – where inputs are tracked and timely reciprocity is expected. Couples that manage to stave off a tit-for-tat mindset <a href="https://doi.org/10.1177/0956797610373882">tend to be happier</a>. <h2>Too much of a good thing?</h2> The data from our experiment with young couples clearly suggests that using only a joint account is better than using only separate accounts. However, I argue in my new book, “<a href="https://us.macmillan.com/books/9781250280077/">Tightwads and Spendthrifts</a>,” that just a joint account is probably not optimal. When partners use only a joint account, they get an up-close-and-personal view of how the other person is spending money. This kind of transparency is <a href="https://www.businessinsider.com/money-habits-successful-married-couples-avoid-2016-11">normally viewed</a> as a good thing. Some commentators argue that a healthy marriage should have no secrets whatsoever. For example, Willard Harley, Jr., a clinical psychologist who primarily writes for Christian audiences, argues that you should “reveal to your spouse <a href="https://www.marriagebuilders.com/the-policy-of-radical-honesty.htm">as much information about yourself as you know</a>: your thoughts, feelings, habits, likes, dislikes, personal history, daily activities, and plans for the future.” In addition, if your goal is to minimize optional spending, <a href="https://doi.org/10.1002/jcpy.1083">research suggests</a> that the transparency that comes with a joint account can be helpful. We spend less when someone is looking over our shoulder. Still, there are reasons to believe that <a href="https://doi.org/10.1177/0265407500172005">complete transparency can be harmful for couples</a>. Many people have become convinced that if they could just stop buying lattes and avocado toast, they could invest that money and become rich. Unfortunately, the underlying math is highly dubious, as journalist Helaine Olen points out in <a href="https://www.penguinrandomhouse.com/books/308568/pound-foolish-by-helaine-olen/">her book “Pound Foolish</a>.” Still, many people view small indulgences as their primary obstacle to wealth. Complete transparency around these financially inconsequential “treats” <a href="https://slate.com/business/2021/09/partner-hates-retail-therapy-money-advice.html">can lead to unnecessary arguments</a>. Also, spouses may have different passions that their partner does not fully understand. Expenses that seem perfectly reasonable to another hobbyist may seem outrageous <a href="https://academic.oup.com/jcr/article-abstract/19/2/256/1929895">to someone without the proper context</a> – another source of <a href="https://www.sciencedirect.com/science/article/abs/pii/S2352250X21000750">avoidable disagreements</a>. <h2>'Translucent,’ not transparent</h2> I propose that many couples may benefit from a combination of joint and separate accounts. A joint account is essential for ensuring that both partners have immediate and equal access to “our money.” Ideally, all income would be direct-deposited into the joint account, which would help to blur the gap between partners’ earnings. Conspicuous income differences <a href="https://doi.org/10.1086/432228">can jeopardize relationship quality</a>. Separate accounts attached to the joint account can allow some privacy for individual purchases and help partners maintain a sense of autonomy and individuality. Each person gets to spend some of “our money” without their partner looking over their shoulder. Spouses would have a high-level understanding of how much their partner is spending per week or per month, but avoid the occasionally irritating details. This kind of partial financial transparency – <a href="https://us.macmillan.com/books/9781250280077/tightwadsandspendthrifts">what I call “financial translucency</a>” – could help couples strike the right balance between financial and psychological well-being. Of course, this approach requires a lot of trust. If the relationship is already on thin ice, complete financial transparency may be necessary. However, if the relationship is generally in the “good, but could be even better” category, I would argue that financial translucency is worth considering.<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/230070/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <a href="https://theconversation.com/profiles/scott-rick-1534612">Scott Rick</a>, Associate Professor of Marketing, <a href="https://theconversation.com/institutions/university-of-michigan-1290">University of Michigan</a> Image credits: Shutterstock 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-much-do-you-need-to-know-about-how-your-spouse-spends-money-maybe-less-than-you-think-230070">original article</a>.

Money & Banking

Just 15 centimetres of water can float a car – but we are failing to educate drivers about the dangers of floodwaters

<div class="theconversation-article-body"><a href="https://theconversation.com/profiles/amy-peden-1136424">Amy Peden</a>, <a href="https://theconversation.com/institutions/unsw-sydney-1414">UNSW Sydney</a> and <a href="https://theconversation.com/profiles/kyra-hamilton-331594">Kyra Hamilton</a>, <a href="https://theconversation.com/institutions/griffith-university-828">Griffith University</a> Every year in Australia, people driving into floodwaters drown and many more are <a href="https://www.ses.nsw.gov.au/disaster-tabs-header/flood/">rescued</a>. Do you know what to do when there’s water on the road? We searched all state and territory learner and driver handbooks for information about floodwaters, including signage. Our findings, published in the <a href="https://www.sciencedirect.com/science/article/pii/S0022437524000860?via%3Dihub">Journal of Safety Research</a>, are disturbing. Across half of Australia’s states and territories, the driver handbook ignores flooding. That’s a missed opportunity, considering the handbook contains road rules and provides advice on how to navigate safely. While some states fail to provide any flood-related information, others give detailed practical guidance. Only the New South Wales handbook includes explanation of the meaning and purpose of flood signage. This is despite almost all states and territories experiencing vehicle-related flood <a href="https://onlinelibrary.wiley.com/doi/epdf/10.1111/jfr3.12616">deaths</a>, including <a href="https://currents.plos.org/disasters/article/causal-pathways-of-flood-related-river-drowning-deaths-in-australia/">drowning</a>, between 2001 and 2017. It’s a major problem that is only going to get worse as the climate changes. So our research shows driver education needs to come up to speed, fast. <h2>Why do people drive into floodwaters?</h2> Our previous <a href="https://www.sciencedirect.com/science/article/abs/pii/S2212420918301869">research</a> revealed motorists can feel compelled to drive into floodwaters for a range of reasons. These include time pressures such as being late for work or school, or needing to get home to family or pets. Sometimes they feel pressured by their passengers, or motorists behind them on the road, urging them to cross. People also report having been encouraged or instructed as learners to drive into floodwaters. Past experience as a passenger also influences a <a href="https://www.sciencedirect.com/science/article/pii/S1369847823000475">learner driver’s</a> future willingness to drive into floodwaters. So the views of significant others, such as their supervising driver, strongly influence decisions around driving into floodwaters. <figure><iframe src="https://www.youtube.com/embed/ZtlXpDBjU1Q?wmode=transparent&start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe><figcaption>Avoid driving into floodwaters, for life’s sake.</figcaption></figure> <h2>What we did and what we found</h2> We assessed all publicly available, government-issued learner and driver handbooks (12 documents) across all six Australian states and two territories. We also looked for flood-related signage. We used a method for reviewing online material through a systematic search including in-document key words and imagery. Four jurisdictions provided no information on flooding in the handbook. In the ACT, South Australia, Tasmania and Victoria, drivers need to look elsewhere for information on floodwaters and driving safety. Only one jurisdiction provided information on flood signage such as depth markers and “road subject to flooding”. Hats off to the <a href="https://www.nsw.gov.au/sites/default/files/2022-11/Road-User-Handbook-English.pdf">NSW Road User Handbook</a>, which warns: <blockquote> Floodwater is extremely dangerous. Find another way or wait until the road is clear. It’s safer to turn around than to drive in floodwater. </blockquote> For the states and territories that did provide information on floodwaters in the handbook, the content varied. NSW, Queensland and the Northern Territory warned against entering floodwaters in a vehicle. They highlighted the dangers and financial penalties associated with driving on closed roads. In the NT and Western Australia, handbooks provided practical information on when and how to cross floodwaters safely, such as how to gauge safe water depth based on vehicle size, and to avoid fast-flowing water. Although well-intentioned, judgements around what constitutes fast-flowing water are subjective and hard for any driver to assess, let alone learner drivers. Even drivers of larger vehicles such as four-wheel drives are regularly involved in flood-related <a href="https://currents.plos.org/disasters/article/causal-pathways-of-flood-related-river-drowning-deaths-in-australia/">vehicle drowning fatalities</a>. Just <a href="https://www.ses.vic.gov.au/news-and-media/campaigns/15-to-float">45cm</a> of water can float a large 4WD, and considerably less for smaller vehicles. <figure><iframe src="https://www.youtube.com/embed/t4ilUbMXZAQ?wmode=transparent&start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe><figcaption>A small car can float in just 15cm of water.</figcaption></figure> Handbooks represent valuable sources of safety information, particularly for new drivers who must learn important road rules to progress from one licence to another. Such graduated driver licensing schemes reduce road traffic injury, particularly among <a href="https://www.sciencedirect.com/science/article/pii/S0022437523000385">young people</a>. However, many of these handbooks fail to provide consistent, practical evidence-based information about flooding. There is an opportunity here to support safer driving behaviours. <h2>Safety tips for all drivers</h2> We encourage drivers to follow these safety tips: <ul> <li>avoid driving into floodwaters</li> <li>identify alternative routes, so you have a <a href="https://theconversation.com/when-roads-become-rivers-forming-a-plan-b-can-stop-people-driving-into-floodwaters-183036">plan B</a></li> <li>familiarise yourself, and any learner drivers in the household or under your care, with the meaning and purpose of flood signage</li> <li>understand the legal consequences of crossing a road closed sign</li> <li>discuss the dangers of driving into floodwaters with learner drivers and help them formulate their own plan B</li> <li>model safe driving for all passengers, including children.</li> </ul> <h2>Time to lift our game</h2> Driving into floodwaters remains the main cause of <a href="https://currents.plos.org/disasters/article/causal-pathways-of-flood-related-river-drowning-deaths-in-australia/">flood-related drowning</a> in Australia. For our emergency service personnel, driver behaviour, including people ignoring road closed signs, <a href="https://onlinelibrary.wiley.com/doi/abs/10.1002/hpja.181">significantly complicates</a> the already dangerous act of performing a flood rescue. Extreme weather and flooding are likely to become more frequent and intense in the future. That means the chance of being faced with a flooded road is growing. So information about driving during floods is vital for all, from the newly licensed to the experienced driver. We hope our research will encourage all states and territories to include provide practical, evidence-based advice on floods in driver handbooks as soon as possible.<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/233116/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <a href="https://theconversation.com/profiles/amy-peden-1136424">Amy Peden</a>, NHMRC Research Fellow, School of Population Health & co-founder UNSW Beach Safety Research Group, <a href="https://theconversation.com/institutions/unsw-sydney-1414">UNSW Sydney</a> and <a href="https://theconversation.com/profiles/kyra-hamilton-331594">Kyra Hamilton</a>, Associate Professor in Applied Psychology, <a href="https://theconversation.com/institutions/griffith-university-828">Griffith University</a> Image credits: Shutterstock 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/just-15-centimetres-of-water-can-float-a-car-but-we-are-failing-to-educate-drivers-about-the-dangers-of-floodwaters-233116">original article</a>. </div>

Travel Trouble

Why doesn’t water help with spicy food? What about milk or beer?

<div class="theconversation-article-body"><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> Spicy foods taste spicy because they contain a family of compounds called capsaicinoids. Capsaicin is the major culprit. It’s found in chillies, jalapeños, cayenne pepper, and is even the active ingredient in <a href="https://pubmed.ncbi.nlm.nih.gov/31334983/">pepper spray</a>. Capsaicin doesn’t actually physically heat up your mouth. The burning sensation comes from receptors in the mouth reacting to capsaicin and sending a signal to the brain that something is very hot. That’s why the “hot” chilli sensation feels so real – we even respond by sweating. To alleviate the heat, you need to remove the capsaicin from your mouth. So why doesn’t drinking water help make that spicy feeling go away? And what would work better instead? <h2>Water-loving and water-hating molecules</h2> To help us choose what might wash the capsaicin away most effectively, it’s helpful to know that capsaicin is a hydrophobic molecule. That means it hates being in contact with water and will not easily mix with it. Look what happens when you try to mix hydrophobic sand with water. <figure><iframe src="https://www.youtube.com/embed/H8cj9CpHW7w?wmode=transparent&start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> On the other hand, hydrophilic molecules love water and are very happy to mix with it. You’ve likely seen this before. You can easily dissolve hydrophilic sugar in water, but it’s hard to wash away hydrophobic oils from your pan using tap water alone. If you try to wash hydrophobic capsaicin away with water, it won’t be very effective, because hydrophilic and hydrophobic substances don’t mix. Going for iced water will be even less effective, as hydrophobic capsaicin is even less soluble in water at lower temperatures. You may get a temporary sense of relief while the cold liquid is in your mouth, but as soon as you swallow it, you’ll be back where you started. Instead, a good choice would be to consume something that is also hydrophobic. This is because of an old-but-true adage in chemistry that “like dissolves like”. The idea is that generally, hydrophobic substances will not dissolve in something hydrophilic – like water – but will dissolve in something that is also hydrophobic, as this video shows: <figure><iframe src="https://www.youtube.com/embed/s5yfs-Pr_y8?wmode=transparent&start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> <h2>My mouth is on fire. What should I drink instead of water?</h2> A swig of oil would likely be effective, but is perhaps not so palatable. Milk makes for an ideal choice for two reasons. The first is that milk contains hydrophobic fats, which the capsaicin will more easily dissolve in, allowing it to be washed away. The second is that dairy products contain a protein called casein. Casein is an emulsifier, a substance that helps oils and water mix, as in this video: <figure><iframe src="https://www.youtube.com/embed/S4XeQhZRLDE?wmode=transparent&start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> Casein plays a large role in keeping the fat mixed throughout your glass of milk, and it also has a strong affinity for capsaicin. It will readily wrap up and encapsulate capsaicin molecules and assist in carrying them away from the receptor. This relieves the <a href="https://pubmed.ncbi.nlm.nih.gov/36510373/">burning sensation</a>. <h2>OK but I hate drinking milk. What else can I try?</h2> What about raita? This dish, commonly served with Indian curries, is made primarily from yoghurt. So aside from being its own culinary experience, raita is rich in fats, and therefore contains plenty of hydrophobic material. It also contains casein, which will again help lock up and remove the capsaicin. Ice cream would also work, as it contains both casein and large amounts of hydrophobic substances. Some studies have also shown that consuming <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9328490/">drinks with large amounts of sugar</a> can relieve spiciness. What about reaching for that ice cold beer? This is commonly suggested as a suitable approach to stop the burning. At first glance, this may seem a good idea because capsaicin is highly soluble in alcohol. However, most beers only contain between 4–6% alcohol. The bulk of the liquid in beer is water, which is hydrophilic and cannot wash away capsaicin. The small amount of alcohol in your beer would make it slightly more effective, but not to any great degree. Your curry and beer may taste great together, but that’s likely the only benefit. In truth, an alcoholic beverage is not going to help much unless you go for something with a much, much higher alcohol content, which comes with its own problems.<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/226624/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <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> Image credits: Shutterstock 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-doesnt-water-help-with-spicy-food-what-about-milk-or-beer-226624">original article</a>. </div>

Food & Wine

Weight loss: drinking a gallon of water a day probably won’t help you lose weight

<a href="https://theconversation.com/profiles/duane-mellor-136502">Duane Mellor</a>, <a href="https://theconversation.com/institutions/aston-university-1107">Aston University</a> It’s often claimed that if you’re trying to lose weight, one of the things you should do each day is drink plenty of water – with some internet advice even suggesting this should be as much as a gallon (about 4.5 litres). The claim is that water helps burn calories and reduce appetite, which in turn leads to weight loss. But while we all might wish it was this easy to lose weight, unfortunately there’s little evidence to back up these claims. <h2>Myth 1: water helps burn calories</h2> One <a href="https://pubmed.ncbi.nlm.nih.gov/14671205/">small study</a>, of 14 young adults, found drinking 500ml of water increased resting energy expenditure (the amount of calories our body burns before exercise) by about 24%. While this may sound great, this effect only lasted an hour. And this wouldn’t translate to a big difference at all. For an average 70kg adult, they would only use an additional 20 calories – a quarter of a biscuit – for every 500ml of water they drank. <a href="https://pubmed.ncbi.nlm.nih.gov/16822824/">Another study</a> of eight young adults only saw an increase in energy expenditure when the water was fridge cold – reporting a very modest 4% increase in calories burned. This may be because the body needs to use more energy in order to bring the water up to body temperature, or because it requires more energy for the body to filter the increased volume of fluid through the kidneys. And again, this effect was only seen for about an hour. So although scientifically it might be possible, the actual net increase in calories burned is tiny. For example, even if you drank an extra 1.5l of water per day, it would save fewer calories than you’d get in a slice of bread. It’s also worth noting that all this research was in young healthy adults. More research is needed to see whether this effect is also seen in other groups (such as middle-aged and older adults). <h2>Myth 2: water with meals reduces appetite</h2> This claim again seems sensible, in that if your stomach is at least partly full of water there’s less room for food – so you end up eating less. A number of studies actually support this, particularly those conducted in <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2859815/#:%7E:text=Thus%2C%20when%20combined%20with%20a,meal%20EI%20following%20water%20ingestion.">middle-aged and older adults</a>. It’s also a reason people who are unwell or have a poor appetite are advised <a href="https://www.ageuk.org.uk/bp-assets/globalassets/salford/forms/improve-your-food-and-drink-intake.pdf">not to drink before eating</a> as it may lead to under-eating. But for people looking to lose weight, the science is a little less straightforward. <a href="https://pubmed.ncbi.nlm.nih.gov/17228036/">One study</a> showed middle-aged and older adults lost 2kg over a 12-week period when they drank water before meals compared with people who didn’t drink any water with their meal. Younger participants (aged 21-35) on the other hand did not lose any weight, regardless of whether they drank water before their meal or not. But since the study didn’t use blinding (where information which may influence participants is withheld until after the experiment is finished), it means that participants may have become aware of why they were drinking water before their meal. This may have led some participants to purposefully change how much they ate in the hopes it might increase their changes of losing weight. However, this doesn’t explain why the effect wasn’t seen in young adults, so it will be important for future studies to investigate why this is. The other challenge with a lot of this kind of research is that it only focuses on whether participants eat less during just one of their day’s meals after drinking water. Although this might suggest the potential to lose weight, there’s <a href="https://pubmed.ncbi.nlm.nih.gov/20736036/">very little good-quality evidence</a> showing that reducing appetite in general leads to weight loss over time. Perhaps this is due to our body’s biological drive to <a href="https://pubmed.ncbi.nlm.nih.gov/28193517/">maintain its size</a>. It’s for this reason that no claims can be legally made in Europe about foods which help make you <a href="https://www.cambridge.org/core/journals/proceedings-of-the-nutrition-society/article/satietyenhancing-products-for-appetite-control-science-and-regulation-of-functional-foods-for-weight-management/E4CCAE4C90A220994FD29C27FAE7F666">feel fuller for longer</a> with <a href="https://www.gov.uk/government/publications/nutrition-and-health-claims-guidance-to-compliance-with-regulation-ec-1924-2006-on-nutrition-and-health-claims-made-on-foods/nutrition-and-health-claims-guidance-to-compliance-with-regulation-ec-19242006#section-6">reference to weight loss</a>. So, although there might be some appetite-dulling effects of water, it seems that it might not result in long-term weight change – and may possibly be due to making conscious changes to your diet. <h2>Just water isn’t enough</h2> There’s a pretty good reason why water on its own is not terribly effective at <a href="https://www.cambridge.org/core/journals/proceedings-of-the-nutrition-society/article/eating-habits-and-appetite-control-a-psychobiological-perspective/0D0605739F5150D1A7C49420D75F3CDF">regulating appetite</a>. If it did, prehistoric humans might have starved. But while appetite and satiation – feeling full and not wanting to eat again – aren’t perfectly aligned with being able to <a href="https://pubmed.ncbi.nlm.nih.gov/20736036/">lose weight</a>, it might be a helpful starting point. Part of what helps us to feel full is our stomach. When food enters the stomach, it triggers stretch receptors that in turn lead to the release of hormones which tell us we’re full. But since water is a liquid, it’s rapidly emptied from our stomach – meaning it doesn’t actually fill us up. Even more interestingly, due to the <a href="https://pubmed.ncbi.nlm.nih.gov/16934271/">stomach’s shape</a>, fluids can bypass any semi-solid food content that’s being digested in the lower part of the stomach. This means that water can still be quickly emptied from the stomach. So even if it’s consumed at the end of a meal it might not necessarily extend your feelings of fullness. If you’re trying to eat less and lose weight, drinking excessive amounts of water may not be a great solution. But there is evidence showing when water is mixed with other substances (such as <a href="https://pubmed.ncbi.nlm.nih.gov/30166637/">fibre</a>, <a href="https://www.sciencedirect.com/science/article/pii/0031938494903034">soups</a> or vegetable sauces) this can delay how fast the stomach empties its contents – meaning you feel fuller longer. But while water may not help you lose weight directly, it may still aid in weight loss given it’s the healthiest drink we can choose. Swapping high-calorie drinks such as soda and alcohol for water may be an easy way of reducing the calories you consume daily, which may help with weight loss.<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/211311/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <a href="https://theconversation.com/profiles/duane-mellor-136502">Duane Mellor</a>, Lead for Evidence-Based Medicine and Nutrition, Aston Medical School, <a href="https://theconversation.com/institutions/aston-university-1107">Aston University</a> Image credits: Shutterstock 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/weight-loss-drinking-a-gallon-of-water-a-day-probably-wont-help-you-lose-weight-211311">original article</a>.

Body

Drinking lots of water may seem like a healthy habit – here’s when and why it can prove toxic

<div class="theconversation-article-body"><a href="https://theconversation.com/profiles/adam-taylor-283950">Adam Taylor</a>, <a href="https://theconversation.com/institutions/lancaster-university-1176">Lancaster University</a> In late 2023, actor <a href="https://www.glamour.com/story/brooke-shields-recently-experienced-a-full-blown-seizure-and-bradley-cooper-came-running?utm_source=instagram&utm_medium=social&utm_content=instagram-bio-link&client_service_id=31196&client_service_name=glamour&service_user_id=1.78e+16&supported_service_name=instagram_publishing&utm_brand=glm&utm_social_type=owned">Brooke Shields</a> suffered a seizure after “flooding” her body with water. Shields became dangerously low on sodium while preparing for her show by drinking loads of water. “I flooded my system and I drowned myself,” she would later explain. “And if you don’t have enough sodium in your blood or urine or your body, you can have a seizure.” Shields said she found herself walking around outside for “no reason at all”, wondering: “Why am I out here?” <blockquote> Then I walk into the restaurant and go to the sommelier who had just taken an hour to watch my run through. That’s when everything went black. Then my hands drop to my side and I go headfirst into the wall. </blockquote> Shields added that she was “frothing at the mouth, totally blue, trying to swallow my tongue”. Like Shields, many people may be unaware of the dangers of drinking excessive amounts of water – especially because hydration is so often associated with health benefits. Models and celebrities <a href="https://www.teenvogue.com/story/drinking-water-flawless-skin#:%7E:text=If%20you're%20reading%20a,long%20hours%20at%20a%20time.">often advocate</a> drinking lots of water to help maintain clear, smooth skin. Some <a href="https://www.independent.co.uk/life-style/75-hard-challenge-before-and-after-tiktok-b2382706.html">social media influencers</a> have promoted drinking a gallon of water daily for weight loss. But excessive water consumption can cause <a href="https://patient.info/treatment-medication/hyponatraemia-leaflet">hyponatraemia</a> – a potentially fatal condition of low sodium in the blood. <h2>Worried about hydration levels? Check your urine</h2> The body strictly regulates its water content to maintain the optimum level of <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2323003/">total body water</a> and “osmolality” – the concentration of dissolved particles in your blood. Osmolality increases when you are dehydrated and decreases when you have too much fluid in your blood. Osmolality is monitored by <a href="https://pubmed.ncbi.nlm.nih.gov/9074779/">osmoreceptors</a> that regulate sodium and water balance in the hypothalamus – the part of the brain that controls numerous hormones. These osmoreceptors signal the release of antidiuretic hormone (ADH), which acts on blood vessels and the kidneys to control the amount of water and salt in the body. <figure><iframe src="https://www.youtube.com/embed/Qghf7Y9ILAs?wmode=transparent&start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> In healthy people, the body releases ADH when osmolality becomes high. ADH tells the kidneys to reabsorb water, which makes urine more concentrated. The reabsorbed water dilutes the blood, bringing osmolality back to normal levels. Low blood osmolality suppresses the release of ADH, reducing how much water the kidneys reabsorb. This dilutes your urine, which the body then passes to rid itself of the excess water. Healthy urine should be clear and odourless. Darker, yellower urine with a noticeable odour can indicate dehydration – although medications and certain foods, including <a href="https://pubmed.ncbi.nlm.nih.gov/3433805/">asparagus</a>, can affect urine colour and odour, too. <h2>How much is too much?</h2> Adults should consume <a href="https://www.nhs.uk/live-well/eat-well/food-guidelines-and-food-labels/water-drinks-nutrition/">two-to-three litres per day</a>, of which around 20% comes from food. However, we can lose <a href="https://www.ncbi.nlm.nih.gov/books/NBK236237/">up to ten litres</a> of water through perspiration – so sweating during exercise or in hot weather increases the amount of water we need to replace through drinking. Some medical conditions can cause overhydration. Approximately <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3616165/">one in five</a> schizophrenia patients drink water compulsively, a dangerous condition known as <a href="https://www.theguardian.com/uk-news/2024/apr/15/woman-died-mental-hospital-excessive-water-drinking-inquest#:%7E:text=Woman%20died%20at%20mental%20hospital%20after%20excessive%20water%20drinking%2C%20inquest%20told,-Parents%20of%20Lillian&text=A%20woman%20collapsed%20and%20died,water%2C%20an%20inquest%20has%20heard.">psychogenic polydipsia</a>. One long-term study found that patients with psychogenic polydipsia have a <a href="https://pubmed.ncbi.nlm.nih.gov/18984069/">“74% greater chance</a> of dying before a non-polydipsic patient”. In <a href="https://pubmed.ncbi.nlm.nih.gov/22306188/">some cases</a>, people with <a href="https://psychiatry-psychopharmacology.com/en/childhood-and-adolescence-disorders-psychogenic-polydipsia-in-an-adolescent-with-eating-disorder-a-case-report-132438">anorexia nervosa</a> can also suffer from compulsive water drinking. <figure><iframe src="https://www.youtube.com/embed/ReQew2zcN7c?wmode=transparent&start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> For those suffering from polydipsia, treatment is focused on medication to reduce the <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10675986/">urge to drink</a>, as well as <a href="https://www.uptodate.com/contents/overview-of-the-treatment-of-hyponatremia-in-adults/print">increasing sodium levels</a>. This should be done gradually to avoid causing <a href="https://www.ncbi.nlm.nih.gov/books/NBK562251/">myelinolysis</a> – <a href="https://www.ncbi.nlm.nih.gov/books/NBK551697/">neurological damage</a> caused by rapid changes in sodium levels in nerve cells. In rare but often highly publicised cases such as that of <a href="http://news.bbc.co.uk/onthisday/hi/dates/stories/november/13/newsid_2516000/2516593.stm">Leah Betts</a> in 1995, some users of the illegal drug MDMA (also known as <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6119400/">ecstasy)</a> have <a href="https://pubmed.ncbi.nlm.nih.gov/11265566/">died</a> after drinking copious amounts of water to rehydrate after dancing and sweating. The drug <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5008716/">increases body temperature</a>, so users drink water to avoid overheating. Unfortunately, MDMA also triggers the <a href="https://pubmed.ncbi.nlm.nih.gov/12105115/">unnecessary release of ADH</a>, causing water retention. The body becomes unable to rid itself of excess water, which affects its electrolyte levels – causing cells to swell with water. Symptoms of water intoxication start with nausea, vomiting, blurred vision and dizziness. As the condition progresses, sufferers can often display symptoms of <a href="https://www.nhs.uk/mental-health/conditions/psychosis/symptoms/">psychosis</a>, such as inappropriate behaviour, confusion, delusions, disorientation and hallucinations. These symptoms are caused by <a href="https://www.ncbi.nlm.nih.gov/books/NBK470386/">hyponatraemia</a>, where sodium levels are diluted or depleted in blood and the subsequent imbalance of electrolytes affects the nervous system. Water begins to move into the brain causing <a href="https://www.sciencedirect.com/science/article/pii/S1572349604000149">a cerebral oedema</a> – brain swelling because of excessive fluid buildup, which is usually fatal if not treated. A healthy body will tell you when it needs water. If you’re thirsty and your urine is dark with a noticeable odour, then you need to drink more. If you aren’t thirsty and your urine is clear or the colour of light straw, then you’re already doing a good job of hydrating yourself.<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/228715/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <a href="https://theconversation.com/profiles/adam-taylor-283950">Adam Taylor</a>, Professor and Director of the Clinical Anatomy Learning Centre, <a href="https://theconversation.com/institutions/lancaster-university-1176">Lancaster University</a> Image credits: Shutterstock 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/drinking-lots-of-water-may-seem-like-a-healthy-habit-heres-when-and-why-it-can-prove-toxic-228715">original article</a>. </div>

Body

What is micellar water and how does it work?

<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> Micellar water, a product found in supermarkets, chemists and bathroom cabinets around the world, is commonly used to remove make-up. It’s a very effective cleanser and many people swear by it as part of their skincare routine. So, what is micellar water and why is it so good at getting makeup and sunscreen off? Here’s the science. <h2>What are micelles?</h2> Oil and water generally don’t mix, which is why you’ll struggle to remove makeup and sunscreen (which both contain oils) with just plain water. But micellar water products contain something called micelles – clusters of molecules that are very effective at removing oily substances. To understand why, you need to first know two chemistry terms: hydrophilic and hydrophobic. A hydrophilic substance “loves” water and mixes easily with it. Salt and sugar are examples. A hydrophobic substance “hates” water and generally refuses to mix with it. Examples include oil and wax. Hydrophilic materials will happily mix with other hydrophilic materials. The same goes for hydrophobic substances. But if you try to combine hydrophilic and hydrophobic materials, they won’t mix. <h2>How are micelles formed? It’s all about surfactants</h2> The micelles in micellar water are formed by special molecules known as surfactants. Surfactant stands for surface active agent. These molecules looked at their hydrophilic and hydrophobic brethren and said, why not both? They are typically comprised of two ends: a head group that is hydrophilic and a tail that is hydrophobic. When a small amount of surfactant is added to water, the two ends of the molecule have competing interests. The hydrophilic head wants to be in the water, but the hydrophobic tail can’t stand water. Add enough surfactant and, eventually, we will pass a critical micelle concentration and the surfactants will self-assemble into clusters of approximately 20 to 100 surfactant molecules. All the hydrophilic heads will be pointing outwards, while the hydrophobic tails remain “hidden” at the centre. These clusters are micelles. These micelles have a hydrophilic exterior, meaning that they are very happy to remain mixed throughout water. However, in the centre remains a hydrophobic pocket that’s very good at attracting oils. This is very handy, and helps explain why adding some detergent (a surfactant) to water will allow you to wash an oily saucepan. The surfactant first helps lift of the oil, and then the oil can remained mixed into the water, finding a new home in the hydrophobic centre of the micelle. <figure><iframe src="https://www.youtube.com/embed/fnRBCn8fm2o?wmode=transparent&start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> <h2>Micellar water in action</h2> Surfactants are in your dishwashing detergent, your body wash, your shampoo, your toothpaste and even many foods. In all of these cases, they are there to help the water interact with the dirt and oils, and micellar water is no different. When you apply some micellar water to a cotton pad, another convenient interaction occurs. The wet cotton is hydrophilic (loves water). Consequently, some of the micelles will unravel, with the hydrophilic heads being attracted to the wet cotton pad. Now, sticking out from the surface will be a layer of hydrophobic tail groups. These hydrophobic tails cannot wait to attract themselves to makeup, sunscreen, oils, dirt, grease and other contaminants on your face. As you sweep the cotton pad across your skin, these contaminants bind to the hydrophobic tails and are removed from the skin. Some contaminants will also find themselves encapsulated in the hydrophobic centres of the micelle. Either way, a cleaner surface is left behind. Look at how a cotton wipe soaked in micellar water cleans up a small oil spill, in comparison to water alone. <figure><iframe src="https://www.youtube.com/embed/5Nge5FEiuYE?wmode=transparent&start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> <h2>So why shouldn’t I just use dishwashing detergent to wash my face?</h2> Technically, that would work as detergent does indeed contain lots of micelle-forming surfactants. But these particular surfactants would probably cause a lot of skin and eye irritation, while also damaging and drying out your skin. Not nice. The surfactants in micellar water are chosen to be mild and well tolerated by most people’s skin. But micellar water isn’t the only skincare product to contain micelles. There are many other face-cleaning products that also make great use of surfactant molecules and work very well too. Now, it’s not perfect. While it is effective at removing a wide range of contaminants, thick or heavy makeup might not come off easily with micellar water (you might need to do a more vigorous clean). Some products say there is “zero residue”, although the fine print clearly states this refers to visible residue. Many products also state there is no rinse off required. Surfactants will remain on your skin after product use, but for many people they don’t cause irritation. If your skin is feeling irritated after using a micellar water product, you can try rinsing afterwards or discontinuing use. And as is the case with many cosmetic products, you should test it first on a small patch of skin before using it all over your face.<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/219492/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <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> Image credits: Getty Images 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-micellar-water-and-how-does-it-work-219492">original article</a>.

Beauty & Style

How much weight do you actually need to lose? It might be a lot less than you think

<a href="https://theconversation.com/profiles/nick-fuller-219993">Nick Fuller</a>, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a> If you’re one of the <a href="https://www.finder.com.au/new-years-resolutions-statistics">one in three</a> Australians whose New Year’s resolution involved losing weight, it’s likely you’re now contemplating what weight-loss goal you should actually be working towards. But type “setting a weight loss goal” into any online search engine and you’ll likely be left with more questions than answers. Sure, the many weight-loss apps and calculators available will make setting this goal seem easy. They’ll typically use a body mass index (BMI) calculator to confirm a “healthy” weight and provide a goal weight based on this range. Your screen will fill with trim-looking influencers touting diets that will help you drop ten kilos in a month, or ads for diets, pills and exercise regimens promising to help you effortlessly and rapidly lose weight. Most sales pitches will suggest you need to lose substantial amounts of weight to be healthy – making weight loss seem an impossible task. But the research shows you don’t need to lose a lot of weight to achieve health benefits. <h2>Using BMI to define our target weight is flawed</h2> We’re a society fixated on numbers. So it’s no surprise we use measurements and equations to score our weight. The most popular is BMI, a measure of our body weight-to-height ratio. BMI classifies bodies as underweight, normal (healthy) weight, overweight or obese and can be a useful tool for weight and health screening. But it shouldn’t be used as the single measure of what it means to be a healthy weight when we set our weight-loss goals. This is <a href="https://theconversation.com/using-bmi-to-measure-your-health-is-nonsense-heres-why-180412">because</a> it: <ul> <li> fails to consider two critical factors related to body weight and health – body fat percentage and distribution </li> <li> does not account for significant differences in body composition based on gender, ethnicity and age. </li> </ul> <h2>How does losing weight benefit our health?</h2> Losing just 5–10% of our body weight – between 6 and 12kg for someone weighing 120kg – can significantly improve our health in four key ways. 1. Reducing cholesterol Obesity increases the chances of having too much low-density lipoprotein (LDL) cholesterol – also known as bad cholesterol – because carrying excess weight changes how our bodies produce and manage lipoproteins and triglycerides, another fat molecule we use for energy. Having too much bad cholesterol and high triglyceride levels is not good, narrowing our arteries and limiting blood flow, which increases the risk of heart disease, heart attack and stroke. But <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4987606/">research</a> shows improvements in total cholesterol, LDL cholesterol and triglyceride levels are evident with just 5% weight loss. 2. Lowering blood pressure Our blood pressure is considered high if it reads more than 140/90 on at least two occasions. Excess weight is <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082272/">linked to</a> high blood pressure in <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082272/">several ways</a>, including changing how our sympathetic nervous system, blood vessels and hormones regulate our blood pressure. Essentially, high blood pressure makes our heart and blood vessels work harder and less efficiently, damaging our arteries over time and increasing our risk of heart disease, heart attack and stroke. Like the improvements in cholesterol, a 5% weight loss <a href="https://onlinelibrary.wiley.com/doi/10.1002/oby.21358">improves</a> both systolic blood pressure (the first number in the reading) and diastolic blood pressure (the second number). A <a href="https://www.ahajournals.org/doi/10.1161/01.hyp.0000094221.86888.ae">meta-analysis of 25 trials</a> on the influence of weight reduction on blood pressure also found every kilo of weight loss improved blood pressure by one point. 3. Reducing risk for type 2 diabetes Excess body weight is the primary manageable risk factor for type 2 diabetes, particularly for people carrying a lot of visceral fat around the abdomen (belly fat). Carrying this excess weight can cause fat cells to release pro-inflammatory chemicals that disrupt how our bodies regulate and use the insulin produced by our pancreas, leading to high blood sugar levels. Type 2 diabetes can lead to serious medical conditions if it’s not carefully managed, including damaging our heart, blood vessels, major organs, eyes and nervous system. <a href="https://www.nejm.org/doi/full/10.1056/nejmoa012512">Research</a> shows just 7% weight loss reduces risk of developing type 2 diabetes by 58%. 4. Reducing joint pain and the risk of osteoarthritis Carrying excess weight can cause our joints to become inflamed and damaged, making us more prone to osteoarthritis. <a href="https://pubmed.ncbi.nlm.nih.gov/21425246/">Observational studies</a> show being overweight doubles a person’s risk of developing osteoarthritis, while obesity increases the risk fourfold. Small amounts of weight loss alleviate this stress on our joints. <a href="https://pubmed.ncbi.nlm.nih.gov/15986358/">In one study</a> each kilogram of weight loss resulted in a fourfold decrease in the load exerted on the knee in each step taken during daily activities. <h2>Focus on long-term habits</h2> If you’ve ever tried to lose weight but found the kilos return almost as quickly as they left, you’re not alone. An <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5764193/">analysis</a> of 29 long-term weight-loss studies found participants regained more than half of the weight lost within two years. Within five years, they regained more than 80%. When we lose weight, we take our body out of its comfort zone and trigger its survival response. It then counteracts weight loss, triggering several <a href="https://pubmed.ncbi.nlm.nih.gov/25896063/">physiological responses</a> to defend our body weight and “survive” starvation. Just as the problem is evolutionary, the solution is evolutionary too. Successfully losing weight long-term comes down to: <ul> <li> losing weight in small manageable chunks you can sustain, specifically periods of weight loss, followed by periods of weight maintenance, and so on, until you achieve your goal weight </li> <li> making gradual changes to your lifestyle to ensure you form habits that last a lifetime. </li> </ul> Setting a goal to reach a healthy weight can feel daunting. But it doesn’t have to be a pre-defined weight according to a “healthy” BMI range. Losing 5–10% of our body weight will result in immediate health benefits. At the Boden Group, Charles Perkins Centre, we are studying the science of obesity and running clinical trials for weight loss. You can <a href="https://redcap.sydney.edu.au/surveys/?s=RKTXPPPHKY">register here</a> to express your interest.<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/217287/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <a href="https://theconversation.com/profiles/nick-fuller-219993">Nick Fuller</a>, Charles Perkins Centre Research Program Leader, <a href="https://theconversation.com/institutions/university-of-sydney-841">University of Sydney</a> Image credits: Getty Images 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-much-weight-do-you-actually-need-to-lose-it-might-be-a-lot-less-than-you-think-217287">original article</a>.

Body

Trying to spend less on food? Following the dietary guidelines might save you $160 a fortnight

<a href="https://theconversation.com/profiles/emily-burch-438717">Emily Burch</a>, <a href="https://theconversation.com/institutions/southern-cross-university-1160">Southern Cross University</a> and <a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> A rise in the <a href="https://www.aph.gov.au/About_Parliament/Parliamentary_departments/Parliamentary_Library/pubs/BriefingBook47p/CostOfLiving#:%7E:text=Consumer%20Price%20Index%20over%20time,but%205.1%25%20in%20the%20second">cost of living</a> has led many households to look for ways to save money. New research suggests maintaining a healthy diet, in line with the <a href="https://www.eatforhealth.gov.au/guidelines/guidelines">Australian Dietary Guidelines</a>, is cheaper than an unhealthy diet and <a href="https://southwesthealthcare.com.au/wp-content/uploads/SWH-HP-Healthy-Diets-ASAP-Protocol-Warrnambool-Report-2023.pdf">could save A$160</a> off a family of four’s fortnightly shopping bill. Poor diet is the most common preventable risk factor contributing to chronic disease in <a href="https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)30752-2/fulltext">Australia</a>. So improving your diet can also be an important way to reduce the chance of developing chronic disease. <h2>First, what are the dietary guidelines?</h2> The guidelines provide information on the quantity and types of foods most Australians should consume to promote overall health and wellbeing. Recommendations include eating a wide variety of nutritious foods from the main five food groups: <ul> <li>vegetables and legumes</li> <li>fruit</li> <li>grains</li> <li>lean meats and meat alternatives such as tofu, nuts and legumes</li> <li>dairy products.</li> </ul> The guidelines recommend limiting our intake of foods high in saturated fat, added salt, added sugars and alcohol. <h2>What are Australians eating?</h2> Fewer than <a href="https://www.abs.gov.au/statistics/health/health-conditions-and-risks/dietary-behaviour/latest-release">7%</a> of Australians eat sufficient vegetables, in line with the Australian Dietary Guidelines. In fact, Australians have an average healthy diet score of <a href="https://www.csiro.au/-/media/News-releases/2023/Total-Wellbeing-Diet-Health-Score/Diet-score-2023-Report_September.pdf">55 out of 100</a> – barely passing. Foods that aren’t part of a food group are known as “discretionary” items, which includes alcohol, cakes, biscuits, chocolate and confectionery and most takeaway foods. Because they’re typically high in kilojoules, saturated fat, sodium and added sugars, the Australian Dietary Guidelines recommend they only be eaten occasionally and in small amounts (ideally zero serves). For many households, discretionary items make up a big portion of their grocery shop. Australians consume an average of <a href="https://www.csiro.au/-/media/News-releases/2023/Total-Wellbeing-Diet-Health-Score/Diet-score-2023-Report_September.pdf">28 serves</a> of discretionary choices per week (equal to 28 doughnuts, 28 slices of cake, or 28 cans of soft drink or beer). This is an increase of ten serves since 2015. One recent <a href="https://link.springer.com/article/10.1186/s12966-022-01389-8">study</a> estimated 55% of Australians’ total energy intake was from discretionary items. <h2>What did the researchers find?</h2> Researchers from the Health Promotion Team at South West Healthcare <a href="https://southwesthealthcare.com.au/wp-content/uploads/SWH-HP-Healthy-Diets-ASAP-Protocol-Warrnambool-Report-2023.pdf">recently</a> visited four local supermarkets and takeaway stores in Warrnambool, Victoria, and purchased two baskets of groceries. One basket met the Australian Dietary Guidelines (basket one), the other aligned with the typical dietary intake of Australians (basket two). They compared prices between the two and found basket one would cost approximately $167 less per fortnight for a family of four at the most affordable supermarket. That’s equal to $4,342 a year. Basket one was sufficient to supply a family of four for a fortnight, and aligned with the Australian Dietary Guidelines. It cost $724 and included: <ol> <li>fruit and vegetables (made up 31% of the fortnightly shop)</li> <li>grains and cereals (oats, cornflakes, bread, rice, pasta, Weet-bix)</li> <li>lean meats and alternatives (mince, steak, chicken, tuna, eggs, nuts)</li> <li>milk, yoghurt and cheese</li> <li>oils and spreads (olive oil).</li> </ol> Basket two reflected the current average Australian fortnightly shop for a family of four. In the project, the team spent over half of the fortnightly shop on processed and packaged foods, of which 21% was spent on take-away. This is based on actual dietary intake of the general population reported in the 2011-2012 <a href="https://www.abs.gov.au/statistics/health/health-conditions-and-risks/australian-health-survey-nutrition-first-results-foods-and-nutrients/latest-release#:%7E:text=Food%20consumption,across%20the%20major%20food%20groups.">Australian Health Survey</a>. Basket two cost $891 and included: <ol> <li>fruit and vegetables (made up 13% of the fortnightly shop)</li> <li>grains and cereals (oats, cornflakes, bread, rice, pasta, Weet-bix)</li> <li>lean meats and alternatives (mince, steak, chicken, tuna, eggs, nuts)</li> <li>milk, yogurt and cheese</li> <li>oils and spreads (olive oil, butter)</li> <li>drinks (soft drink, fruit juice)</li> <li>desserts and snacks (muffins, sweet biscuits, chocolate, ice cream, potato chips, muesli bars)</li> <li>processed meats (sausages, ham)</li> <li>convenience meals</li> <li>fast food (pizza, meat pie, hamburger, fish and chips)</li> <li>alcohol (beer, wine).</li> </ol> <h2>But a healthy basket is still unaffordable for many</h2> While this piece of work, and other <a href="https://www.mdpi.com/1660-4601/15/11/2469">research</a>, suggests a healthy diet is less expensive than an unhealthy diet, affordability is still a challenge for many families. The Warrnambool research found basket one (which aligned with guidelines) was still costly, requiring approximately 25% of a median household income. This is unaffordable for many. For a household reliant on welfare, basket one would require allocating 26%-38% of their income. This highlights how the rising cost of living crisis is affecting those already facing financial difficulties. Around 3.7 <a href="https://reports.foodbank.org.au/foodbank-hunger-report-2023/">million</a> Australian households did not have access to enough food to meet their basic needs at some point in the last 12 months. Policy action is needed from the Australian government to make recommended diets more affordable for low socioeconomic groups. This means lowering the costs of healthy foods and ensuring household incomes are sufficient. <h2>What else can you do to cut your spending?</h2> To help reduce food costs and support your health, reducing discretionary foods could be a good idea. Other ways to reduce your grocery bill and keep your food healthy and fresh include: <ul> <li> planning for some meatless meals each week. Pulses (beans, lentils and legumes) are nutritious and cheap (a can is <a href="https://coles.com.au/product/coles-chick-peas-420g-8075852?uztq=46abcbb7e16253b0cdc3e6c5bbe6a3f0&cid=col_cpc_Generic%7cColesSupermarkets%7cPLA%7cCatchAll%7cAustralia%7cBroad&s_kwcid=AL!12693!3!675842378376!!!g!326304616489!&gad_source=1&gclid=CjwKCAjwkY2qBhBDEiwAoQXK5SceYhU2VtKepNLXWN218GH8Cp8Vs9cnYynCBwRqQPaW3UYNX2SVIBoC_6EQAvD_BwE&gclsrc=aw.ds">less than $1.50</a>. Here are some great pulse recipes to <a href="https://nomoneynotime.com.au/healthy-easy-recipes/filter/keywords--vegetarian/p2">try</a> </li> <li> checking the specials and buy in bulk (to store or freeze) when items are cheaper </li> <li> making big batches of meals and freezing them. Single-serve portions can help save time for lunches at work, saving on takeaway </li> <li> Australian supermarkets are <a href="https://www.theguardian.com/australia-news/datablog/2023/jul/27/cost-of-living-grocery-store-price-rises-cheapest-fresh-produce-australia-woolworths-coles#:%7E:text=The%20results%20showed%20independent%20and,best%20place%20for%20affordable%20groceries">almost never</a> the cheapest place for fresh produce, so shop around for farmers markets or smaller local grocery shops </li> <li> buying generic brands when possible, as they are <a href="https://www.cambridge.org/core/journals/public-health-nutrition/article/streamlined-datagathering-techniques-to-estimate-the-price-and-affordability-of-healthy-and-unhealthy-diets-under-different-pricing-scenarios/872EA6396533166E0C6FA94C809D9CAC#r">notably cheaper</a>. Supermarkets usually <a href="https://theconversation.com/the-science-that-makes-us-spend-more-in-supermarkets-and-feel-good-while-we-do-it-23857">promote</a> the items they want you to buy at eye-level, so check the shelves above and below for cheaper alternatives.<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/216749/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> </li> </ul> <a href="https://theconversation.com/profiles/emily-burch-438717">Emily Burch</a>, Dietitian & Academic, <a href="https://theconversation.com/institutions/southern-cross-university-1160">Southern Cross University</a> and <a href="https://theconversation.com/profiles/lauren-ball-14718">Lauren Ball</a>, Professor of Community Health and Wellbeing, <a href="https://theconversation.com/institutions/the-university-of-queensland-805">The University of Queensland</a> Image credits: Getty Images 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/trying-to-spend-less-on-food-following-the-dietary-guidelines-might-save-you-160-a-fortnight-216749">original article</a>.

Food & Wine

Eye-watering price tag for "remarkable" first class Titanic menu

A first class dinner menu from the Titanic has been found and sold at an auction in England for £84,000 (around $162,000 AUD) on November 11. The water-stained menu was dated April 11, 1912 just three days before the ship hit an iceberg, ultimately meeting it's ill-fated end causing over 1500 deaths. Wealthy passengers at the time were spoiled with choice, with oysters, salmon, beef, squab (baby pigeon), spring lamb among other dishes on the menu, and that's not including dessert. Auctioneers Henry Aldridge & Son said it was unclear how the menu made it off the ship intact, but the slight water damage suggests that it was recovered from the body of a victim. The rare artefact, which is over 111 years old belonged to amateur historian Len Stephenson, from Nova Scotia, Canada, who passed away in 2017. No one knew he had it, including his family, who only discovered it after going through his belongings following his death. “About six months ago his daughter and his son-in-law, Allen, felt the time was right to go through his belongings,” auctioneer Andrew Aldridge said. “As they did they found this menu in an old photo album. “Len was a very well thought-of historian in Nova Scotia which has strong connections with the Titanic. The body recovery ships were from Nova Scotia and so all the victims were taken back there. “Sadly, Len has taken the secret of how he acquired this menu to the grave with him.” Stephenson worked at a post office and would talk to people, collect old pictures and write letters for them, which might be how he got the rare artefact. According to the auctioneer, no other first class dinner menus dated April 11, 1912 have been recovered from the titanic making this “a remarkable survivor from the most famous Ocean liner of all time”. “There are a handful of April 14 menus in existence but you just don’t see menus from April 11. Most of them would have gone down with the ship,” Aldridge said. “Whereas with April 14 menus, passengers would have still had them in their coat and jacket pockets from earlier on that fateful night and still had them when they were taken off the ship," he added. A few other items recovered from the Titanic were also sold, including a Swiss-made pocket watch recovered from passenger Sinai Kantor which fetched £97,000 (around $187,000 AUD). A tartan-patterned deck blanket, which was likely used during the rescue operation also sold for £96,000 (around $185,000). Images: Henry Aldridge & Son of Devizes, Wiltshire

Cruising

Does running water really trigger the urge to pee? Experts explain the brain-bladder connection

<a href="https://theconversation.com/profiles/james-overs-1458017">James Overs</a>, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a>; <a href="https://theconversation.com/profiles/david-homewood-1458022">David Homewood</a>, <a href="https://theconversation.com/institutions/melbourne-health-950">Melbourne Health</a>; <a href="https://theconversation.com/profiles/helen-elizabeth-oconnell-ao-1458226">Helen Elizabeth O'Connell AO</a>, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a>, and <a href="https://theconversation.com/profiles/simon-robert-knowles-706104">Simon Robert Knowles</a>, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a> We all know that feeling when nature calls – but what’s far less understood is the psychology behind it. Why, for example, do we get the urge to pee just before getting into the shower, or when we’re swimming? What brings on those “nervous wees” right before a date? Research suggests our brain and bladder are in constant communication with each other via a neural network called the <a href="https://www.einj.org/journal/view.php?doi=10.5213/inj.2346036.018">brain-bladder axis</a>. This complex web of circuitry is comprised of sensory neural activity, including the sympathetic and parasympathetic nervous systems. These neural connections allow information to be sent <a href="https://doi.org/10.3390/diagnostics12123119">back and forth</a> between the brain and bladder. The brain-bladder axis not only facilitates the act of peeing, but is also responsible for telling us we need to go in the first place. <h2>How do we know when we need to go?</h2> As the bladder fills with urine and expands, this activates special receptors detecting stretch in the nerve-rich lining of the bladder wall. This information is then relayed to the “periaqueductal gray” – a part of the brain in the brainstem which <a href="https://www.nature.com/articles/nrn2401">constantly monitors</a> the bladder’s filling status. <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/547931/original/file-20230913-19-2kgkhk.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=1000&fit=clip"><img src="https://images.theconversation.com/files/547931/original/file-20230913-19-2kgkhk.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/547931/original/file-20230913-19-2kgkhk.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=600&h=454&fit=crop&dpr=1 600w, https://images.theconversation.com/files/547931/original/file-20230913-19-2kgkhk.jpg?ixlib=rb-1.1.0&q=30&auto=format&w=600&h=454&fit=crop&dpr=2 1200w, https://images.theconversation.com/files/547931/original/file-20230913-19-2kgkhk.jpg?ixlib=rb-1.1.0&q=15&auto=format&w=600&h=454&fit=crop&dpr=3 1800w, https://images.theconversation.com/files/547931/original/file-20230913-19-2kgkhk.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=754&h=570&fit=crop&dpr=1 754w, https://images.theconversation.com/files/547931/original/file-20230913-19-2kgkhk.jpg?ixlib=rb-1.1.0&q=30&auto=format&w=754&h=570&fit=crop&dpr=2 1508w, https://images.theconversation.com/files/547931/original/file-20230913-19-2kgkhk.jpg?ixlib=rb-1.1.0&q=15&auto=format&w=754&h=570&fit=crop&dpr=3 2262w" alt="" /></a><figcaption>The periaqueductal gray is a section of gray matter located in the midbrain section of the brainstem. <a class="source" href="https://en.wikipedia.org/wiki/Brainstem#/media/File:1311_Brain_Stem.jpg">Wikimedia/OpenStax</a>, <a class="license" href="http://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA</a></figcaption></figure> Once the bladder reaches a certain threshold (roughly 250-300ml of urine), another part of the brain called the “pontine micturition centre” is activated and signals that the bladder needs to be emptied. We, in turn, <a href="https://pubmed.ncbi.nlm.nih.gov/16254993/">register this</a> as that all-too-familiar feeling of fullness and pressure down below. Beyond this, however, a range of situations can trigger or exacerbate our need to pee, by increasing the production of urine and/or stimulating reflexes in the bladder. <h2>Peeing in the shower</h2> If you’ve ever felt the need to pee while in the shower (no judgement here) it may be due to the sight and sound of running water. In a 2015 study, <a href="https://doi.org/10.1371/journal.pone.0126798">researchers demonstrated</a> that males with urinary difficulties found it easier to initiate peeing when listening to the sound of running water being played on a smartphone. Symptoms of overactive bladder, including urgency (a sudden need to pee), have also been <a href="https://www.alliedacademies.org/articles/environmental-cues-to-urgency-and-incontinence-episodes-in-chinesepatients-with-overactive-urinary-bladder-syndrome.html">linked to</a> a range of environmental cues involving running water, including washing your hands and taking a shower. This is likely due to both physiology and psychology. Firstly, the sound of running water may have a relaxing physiological effect, increasing activity of the parasympathetic nervous system. This would relax the bladder muscles and prepare the bladder for emptying. At the same time, the sound of running water may also have a conditioned psychological effect. Due to the countless times in our lives where this sound has coincided with the actual act of peeing, it may trigger an instinctive reaction in us to urinate. This would happen in the same way <a href="https://www.simplypsychology.org/pavlov.html">Pavlov’s dog learnt</a>, through repeated pairing, to salivate when a bell was rung. <h2>Cheeky wee in the sea</h2> But it’s not just the sight or sound of running water that makes us want to pee. Immersion in cold water has been shown to cause a “cold shock response”, <a href="https://pubmed.ncbi.nlm.nih.gov/19945970">which activates</a> the sympathetic nervous system. This so-called “fight or flight” response drives up our blood pressure which, in turn, causes our kidneys to filter out more fluid from the bloodstream to stabilise our blood pressure, in a process called “<a href="https://link.springer.com/article/10.1007/BF00864230">immersion diuresis</a>”. When this happens, our bladder fills up faster than normal, triggering the urge to pee. Interestingly, immersion in very warm water (such as a relaxing bath) may also increase urine production. In this case, however, it’s due to activation of the parasympathetic nervous system. <a href="https://doi.org/10.1007/s004210050065">One study</a> demonstrated an increase in water temperature from 40℃ to 50℃ reduced the time it took for participants to start urinating. Similar to the effect of hearing running water, the authors of the study suggest being in warm water is calming for the body and activates the parasympathetic nervous system. This activation can result in the relaxation of the bladder and possibly the pelvic floor muscles, bringing on the urge to pee. <h2>The nervous wee</h2> We know stress and anxiety can cause bouts of nausea and butterflies in the tummy, but what about the bladder? Why do we feel a sudden and frequent urge to urinate at times of heightened stress, such as before a date or job interview? When a person becomes stressed or anxious, the body goes into fight-or-flight mode through the activation of the sympathetic nervous system. This triggers a cascade of physiological changes designed to prepare the body to face a perceived threat. As part of this response, the muscles surrounding the bladder may contract, leading to a more urgent and frequent need to pee. Also, as is the case during immersion diuresis, the increase in blood pressure associated with the stress response may <a href="https://doi.org/10.1172/JCI102496">stimulate</a> the kidneys to produce more urine. <h2>Some final thoughts</h2> We all pee (most of us several times a day). Yet <a href="https://doi.org/10.5489/cuaj.1150">research has shown</a> about 75% of adults know little about how this process actually works – and even less about the brain-bladdder axis and its role in urination. <a href="https://www.continence.org.au/about-us/our-work/key-statistics-incontinence#:%7E:text=Urinary%20incontinence%20affects%20up%20to,38%25%20of%20Australian%20women1.">Most Australians</a> will experience urinary difficulties at some point in their lives, so if you ever have concerns about your urinary health, it’s extremely important to consult a healthcare professional. And should you ever find yourself unable to pee, perhaps the sight or sound of running water, a relaxing bath or a nice swim will help with getting that stream to flow.<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/210808/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /> <a href="https://theconversation.com/profiles/james-overs-1458017">James Overs</a>, Research Assistant, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a>; <a href="https://theconversation.com/profiles/david-homewood-1458022">David Homewood</a>, Urology Research Registrar, Western Health, <a href="https://theconversation.com/institutions/melbourne-health-950">Melbourne Health</a>; <a href="https://theconversation.com/profiles/helen-elizabeth-oconnell-ao-1458226">Helen Elizabeth O'Connell AO</a>, Professor, University of Melbourne, Department of Surgery. President Urological Society Australia and New Zealand, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a>, and <a href="https://theconversation.com/profiles/simon-robert-knowles-706104">Simon Robert Knowles</a>, Associate Professor and Clinical Psychologist, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a> Image credits: Getty Images 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/does-running-water-really-trigger-the-urge-to-pee-experts-explain-the-brain-bladder-connection-210808">original article</a>.

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Princess Diana's dresses fetch an eye-watering sum at auction

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