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Tea drinkers may well live longer

<div class="copy"> <p>Tea is good for you, according to new research from – perhaps not surprisingly – China.</p> <p><span style="font-family: inherit;">Habitual consumption – defined as at least three times a week – is associated with lower risks of cardiovascular disease and all-cause death, according to Xinyan Wang from the Chinese Academy of Medical Sciences.</span></p> <p>In other words, it contributes both to longer life expectancy and more healthy years of life.</p> <p>The favourable health effects appear to be particularly robust for green tea and for those with a long-term love of it.</p> <p>In their study, Wang and colleagues followed 100,902 participants in the <a href="https://www.ncbi.nlm.nih.gov/pubmed/27682885">China-PAR</a> Project who had no history of heart attack, stroke or cancer for a median of 7.3 years. All were classified into one of two groups – habitual and never / non-habitual.</p> <p><span style="font-family: inherit;">Regular drinkers were found to have a 20% lower risk of incident heart disease and stroke, a 22% lower risk of fatal heart disease and stroke, and a 15% decreased risk of all-cause death.</span></p> <p>The analyses estimated, for example, that 50-year-old habitual tea drinkers would develop coronary heart disease and stroke 1.41 years later and live 1.26 years longer than those who never or seldom drank tea.</p> <p>The potential influence of changes in tea drinking behaviour were analysed in a subset of 14,081 participants with assessments at two time points.</p> <p>Habitual drinkers who maintained their habit had a 39% lower risk of incident heart disease and stroke, 56% lower risk of fatal heart disease and stroke, and 29% decreased risk of all-cause death compared to consistent never or non-habitual tea drinkers.</p> <p>“Mechanism studies have suggested that the main bioactive compounds in tea, namely polyphenols, are not stored in the body long-term,” says Dongfeng Gu, senior author of a <a href="https://dx.doi.org/10.1177/2047487319894685">paper</a> in the European Journal of Preventive Cardiology.</p> <p><span style="font-family: inherit;">“Thus, frequent tea intake over an extended period may be necessary for the cardioprotective effect.”</span></p> <p><span style="font-family: inherit;">The study found green tea to be more beneficial than black, though Gu acknowledges that may be because of the preferences of those studied. Only a few preferred black tea.</span></p> <p>Nevertheless, the researchers say their findings “hint at a differential effect between tea types” – and suggest two factors may be at play.</p> <p>First, green tea is a rich source of the polyphenols which protect against cardiovascular disease and its risk factors, but black tea is fully fermented and during this process polyphenols are oxidised into pigments and may lose their antioxidant effects.</p> <p>Second, black tea is often served with milk, which <a href="https://academic.oup.com/eurheartj/article/28/2/219/2887513">previous research</a> has shown may counteract the favourable health effects of tea on vascular function.</p> <img id="cosmos-post-tracker" style="opacity: 0; height: 1px!important; width: 1px!important; border: 0!important; position: absolute!important; z-index: -1!important;" src="https://syndication.cosmosmagazine.com/?id=34602&amp;title=Tea+drinkers+may+well+live+longer" alt="" width="1" height="1" /></div> <div id="contributors"> <p><a href="https://cosmosmagazine.com/health/nutrition/tea-drinkers-may-well-live-longer/">This article</a> was originally published on <a href="https://cosmosmagazine.com">Cosmos Magazine</a> and was written by <a href="https://cosmosmagazine.com/contributor/nick-carne">Nick Carne</a>. </p> </div>

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Tea drinkers at risk of ingesting billions of plastic particles

<p><span>A single tea bag may leave billions of microplastic particles in your cup, a new study has found.</span></p> <p><span>Research published by the American Chemical Society’s journal <em>Environmental Science &amp; Technology</em> discovered that one plastic tea bag released about 11.6 billion microplastic and 3.1 billion nanoplastic particles into brewing water – thousands of times higher than those previously recorded in other foods.</span></p> <p><span>“We were very, very surprised,” Dr Nathalie Tufenkji, a professor of chemical engineering at McGill University and co-author of the study, told <em><a href="https://globalnews.ca/news/5948570/plastic-teabags-microplastics-in-tea/">Global News</a></em>.</span></p> <p><span>“We thought [plastic teabags] maybe release a couple of hundred [plastic] particles, maybe a few thousand. So we were really shocked when we saw they’re releasing billions of particles into a cup of tea.”</span></p> <p><span>The study, which analysed four different commercial teas in plastic packaging, found that the teabags shed two different types of plastic particles that are invisible to the naked eye: polyethylene terephthalate (PET) and nylon.</span></p> <p><span>The McGill University researchers said it is not known whether the ingestion of micro- and nanoplastics could have adverse effects on human’s health. </span></p> <p><span>In its first report on the health risks of plastic in tap and bottled water released last month, the World Health Organization (WHO) said microplastics “don’t appear to pose a health risk at current levels”.</span></p> <p><span>However, the WHO said the findings were based on “limited information” and called for more research on the matter.</span></p> <p><span>Researcher Laura Hernandez told <em><a href="https://www.bbc.com/news/world-us-canada-49845940">BBC</a> </em>shoppers should avoid plastic packaging instead of specific brands. </span></p> <p><span>Some tea manufacturers are moving away from paper in favour of plastic mesh to create a pyramid shape, which was claimed as helping the tea leaves infuse better. Many teabags on the market also use polypropylene as a sealant, preventing the bag from breaking in the cup.</span></p> <p><span>“We encourage consumers to choose loose teas that is sold without packaging or other teas that come in paper teabags,” said Hernandez.</span></p> <p><span>“There is really no need to package tea in plastic, which at the end of the day becomes single-use plastic, which is contributing to you not just ingesting plastic but to the environmental burden of plastic.”</span></p> <p><span>Last year, a study of 250 water bottles from nine different countries revealed that microplastics were found in nearly all major brands.</span></p> <p><span>Sherri Mason, a professor of chemistry at the State University of New York at Fredonia and the research’s leader said the study is not about “pointing fingers” at certain brands.</span></p> <p><span>“It’s really showing that this is everywhere, that plastic has become such a pervasive material in our society, and it’s pervading water — all of these products that we consume at a very basic level,” she told <em><a href="https://www.bbc.com/news/science-environment-43388870">BBC</a></em>.</span></p> <p><span><a href="https://wwf.panda.org/our_work/markets/?348375/Plastic-ingestion-by-humans-could-equate-to-eating-a-credit-card-a-week">A study released by the University of Newcastle</a> in June suggested that the average person consumes 5 grams of plastic every week, or about a credit card’s weight.</span></p>

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There are 4 types of drinker – which one are you?

<p><em><strong>Sarah Callinan is a Research Fellow and Professor Emmanuel Kuntsche is the Director of the Centre for Alcohol Policy Research at La Trobe University.</strong></em></p> <p>It’s easy to see alcohol consumption being a result of thousands of years of ritual and a lifetime of habit. But have you ever stopped to consider why it is you choose to drink? Knowing what motivates people to drink is important to better understanding their needs when it comes to encouraging them to drink less, or in a less harmful way.</p> <p><strong>The four types</strong></p> <p>Personally, everyone can come up with many reasons why he or she is drinking, which makes a scientific understanding of the reasons difficult. But there is something called the <span style="text-decoration: underline;"><strong><a href="https://www.ncbi.nlm.nih.gov/pubmed/3290306" target="_blank">motivational model of alcohol use</a></strong></span>, that argues we drink because we expect a change in how we feel after we do. Originally developed to help treat alcohol dependence, the ideas described in the model led to a new understanding of what motivates people to drink.</p> <p>More precisely, the model assumes people drink to increase positive feelings or decrease negative ones. They’re also motivated by internal rewards such as enhancement of a desired personal emotional state, or by external rewards such as social approval.</p> <p>This results in all drinking motives falling into one of four categories: enhancement (because it’s exciting), coping (to forget about my worries), social (to celebrate), and conformity (to fit in). Drinkers can be high or low in any number of drinking motives – people are not necessarily one type of drinker or the other.</p> <p>All other factors – such as genetics, personality or environment – are just shaping our drinking motives, according to this model. So drinking motives are a final pathway to alcohol use. That is, they’re the gateway through which all these other influences are channelled.</p> <p><strong>1. Social drinking</strong></p> <p>To date, nearly all the research on drinking motives has been done on teens and young adults. Across cultures and countries, social motives are the <span style="text-decoration: underline;"><strong><a href="https://www.ncbi.nlm.nih.gov/pubmed/28337801" target="_blank">most common reason</a></strong></span> young people give for drinking alcohol. In this model, social drinking may be about increasing the amount of fun you are having with your friends. This fits in with the idea that drinking is mainly a social pastime. Drinking for social motives is associated with moderate alcohol use.</p> <p><strong>2. Drinking to conform</strong></p> <p>When people only drink on social occasions because they want to fit in – not because it’s a choice they would normally make – they drink less than those who drink mainly for other reasons. These are the people who will sip a glass of champagne for a toast, or keep a wine in their hand to avoid feeling different from the drinkers around them.</p> <p>In the last couple of years, programs like <span style="text-decoration: underline;"><em><strong><a href="https://www.hellosundaymorning.org/" target="_blank">Hello Sunday Morning</a></strong></em></span> have been encouraging people to take a break from drinking. And by making this more socially acceptable, they may also be decreasing the negative feedback some people receive for not drinking, although this is a theory that needs testing.</p> <p><strong>3. Drinking for enhancement</strong></p> <p>Beyond simply drinking to socialise, <span style="text-decoration: underline;"><strong><a href="https://www.ncbi.nlm.nih.gov/pubmed/16460883" target="_blank">there are two types</a></strong></span> of adolescents and young adults with a particular risky combination of personality and drinking motive preference.</p> <p>First are those who drink for enhancement motives. They are more likely to be extroverted, impulsive, and aggressive. These young people (often male) are more likely to <span style="text-decoration: underline;"><strong><a href="https://www.ncbi.nlm.nih.gov/pubmed/16460883" target="_blank">actively seek to feel drunk</a></strong></span> – as well as other extreme sensations – and have a risk-taking personality.</p> <p><strong>4. Drinking to cope</strong></p> <p>Second, those who drink mainly for coping motives have higher levels of neuroticism, low level of agreeableness and a negative view of the self. These drinkers may be using alcohol to <span style="text-decoration: underline;"><strong><a href="https://www.ncbi.nlm.nih.gov/pubmed/17716823" target="_blank">cope with other problems</a></strong></span> in their life, particularly those related to anxiety and depression. Coping drinkers are <span style="text-decoration: underline;"><strong><a href="https://www.ncbi.nlm.nih.gov/pubmed/16095785" target="_blank">more likely to be female</a></strong></span>, drink more heavily and experience more alcohol-related problems than those who drink for other reasons.</p> <p>While it may be effective in the short term, drinking to cope with problems leads to worse long-term consequences. This may be because the problems that led to the drinking in the first place are not being addressed.</p> <p><strong>Why it matters</strong></p> <p>There is promising research that suggests knowing the motives of heavy drinkers can lead to interventions to reduce harmful drinking. For instance, <span style="text-decoration: underline;"><strong><a href="https://www.sciencedirect.com/science/article/pii/S2211335515001813" target="_blank">one study found</a></strong></span> that tailoring counselling sessions to drinking motives decreased consumption in young women, although there was no significant decrease in men.</p> <p>This research stream is limited by the fact we really only know about the drinking motives of those in their teens and early 20s. Our understanding of why adults are drinking is limited, something our research group is hoping to study in the future.</p> <p>Next time you have a drink, have a think about why you are choosing to do so. There are many people out there having a drink at night to relax. But if you’re aiming to get drunk, you have a higher chance than most of experiencing harm.</p> <p>Alternatively, if you are trying to drink your problems away, it’s worth remembering those problems will still be there in the morning.</p> <p><em>Written by Sarah Callinan and Emmanuel Kuntsche. Republished with permission of <a href="http://theconversation.com/" target="_blank"><span style="text-decoration: underline;"><strong>The Conversation</strong></span></a>.</em><img width="1" height="1" src="https://counter.theconversation.com/content/89377/count.gif?distributor=republish-lightbox-advanced" alt="The Conversation"/></p>

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