{"id":9493,"date":"2025-02-28T18:45:23","date_gmt":"2025-02-28T18:45:23","guid":{"rendered":"https:\/\/site.itshrt.com\/worldnews\/tea-leaves-can-steep-away-lead-study-finds\/"},"modified":"2025-02-28T18:45:23","modified_gmt":"2025-02-28T18:45:23","slug":"tea-leaves-can-steep-away-lead-study-finds","status":"publish","type":"post","link":"https:\/\/site.itshrt.com\/worldnews\/tea-leaves-can-steep-away-lead-study-finds\/","title":{"rendered":"Tea Leaves Can Steep Away Lead, Study Finds"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6606220950177433\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- ItShrt World News -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-6606220950177433\"\r\n     data-ad-slot=\"1882483372\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\r\n<br \/>\n<\/p>\n<div data-testid=\"companionColumn-0\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">Tea leaves pull heavy metals from water, significantly lowering the amount of lead and other dangerous compounds that people may be unknowingly drinking, a new study found.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Recent research <a class=\"css-yywogo\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S096085242101751X\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">has highlighted potential applications<\/a> for used tea leaves, from <a class=\"css-yywogo\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0960148124019098\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">biofuels<\/a> to <a class=\"css-yywogo\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10094581\/\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">gluten-free cookies<\/a>. But the new study shows a public health benefit from something that countless people are already doing. About five billion cups of tea are consumed each day around the world, according to <a class=\"css-yywogo\" href=\"https:\/\/www.tea.co.uk\/news\/article\/tea-loved-by-brits-and-5-billion-cups-of-tea-are-drunk-globally-each-day\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">one estimate<\/a>.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">\u201cYou can see the implications,\u201d said Vinayak Dravid, a materials scientist at Northwestern and an author of the study, <a class=\"css-yywogo\" href=\"https:\/\/pubs.acs.org\/doi\/10.1021\/acsfoodscitech.4c01030\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">which was published this week<\/a>. \u201cHow often do we touch billions of people?\u201d<\/p>\n<p class=\"css-at9mc1 evys1bk0\">In many countries, the water used to steep tea is contaminated with lead from aging pipes. In the United States, nine million homes get their water through pipes that contain lead, according to the <a class=\"css-yywogo\" href=\"https:\/\/www.epa.gov\/newsreleases\/biden-harris-administration-issues-final-rule-requiring-replacement-lead-pipes-within\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">Environmental Protection Agency<\/a>. Lead is especially dangerous to children. Exposure can lead to <a class=\"css-yywogo\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC9150353\/#:~:text=on%20children%20exposed%20to%20lead,%CE%BCg%2FdL%20%5B27%5D.\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">developmental delays<\/a> and <a class=\"css-yywogo\" href=\"https:\/\/www.nih.gov\/news-events\/news-releases\/lead-kids-blood-linked-behavioral-emotional-problems\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">behavioral issues<\/a>.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-1\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">Dr. Dravid and his team tested how different types of tea \u2014 black, white, oolong, green, rooibos, herbal, loose leaf and plain old Lipton \u2014 behaved in water with varying amounts of lead.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">The tea was then allowed to steep for variable periods of time. Afterward, the scientists measured how much lead remained in the water.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Compounds called catechins in tea leaves act like \u201clittle Velcro\u201d hooks to which lead molecules latch, said Michelle Francl, a chemist at Bryn Mawr College and the author of <a class=\"css-yywogo\" href=\"https:\/\/www.pbs.org\/newshour\/science\/how-to-spot-the-chemistry-in-your-cup-of-tea\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">a book on the chemistry of tea<\/a>. Dr. Francl also said that the \u201cridges and valleys\u201d of the tea leaves provided the necessary surface area for that interaction.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-2\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">While those properties have been known for some time, Dr. Dravid and his colleagues were the first to look at the lead-detoxifying powers of a single cup of tea. They found that black tea leaves became wrinkled after roasting and were thus best equipped to absorb heavy metals.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-3\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">\u201cGreen tea and black tea had fairly equivalent amounts of metal absorbed,\u201d said another author, Benjamin Shindel, who was a doctoral candidate at Northwestern while working on the study.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">White tea, on the other hand, undergoes a much more gentle preparation. Its leaves remain smooth, offering less surface area from which to draw heavy metals from water. Herbal tea enthusiasts may be disappointed to learn that chamomile tea does a poor job of heavy-metal filtering, too, probably because it is made with chamomile flowers, not tea leaves.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Still, these distinctions between different types of tea were not the most relevant factor. \u201cIt\u2019s much more important how long you\u2019re brewing the tea for,\u201d Dr. Shindel said.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">The researchers found that steeping a cup of black tea for five minutes could remove 15 percent of lead from the water, which is helpful, but there is \u201cno safe level\u201d of lead exposure, according to the E.P.A.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">\u201cWith lead and other contaminants, any decrease is meaningful to some extent, especially if you have a lack of resources or infrastructure that would already remediate some of these problem materials,\u201d said Caroline Harms, who was an undergraduate student of Dr. Dravid at Northwestern while working on the study.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-4\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">The longer the steeping time, however, the more bitter the resulting tea. Last year, Dr. Francl <a class=\"css-yywogo\" href=\"https:\/\/x.com\/USAinUK\/status\/1750136728034169147\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">caused a minor international scandal<\/a> by suggesting that adding salt to tea could mitigate its bitterness. But even that controversial chemistry hack has its limits. \u201cIt\u2019s not really drinkable after 10 minutes of steeping tea, and no amount of salt is going to help that,\u201d she said.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Some samples in the study had to be steeped for 24 hours, which would render the tea undrinkable.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">The study\u2019s authors said they were less motivated to make public health prescriptions for policymakers than to study a hidden benefit of a global habit.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">The researchers estimated that a country where people drank large amounts of tea would have about 3 percent less lead ingestion from the water supply than a (hypothetical) identical country that did not drink any tea.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">\u201cHow wonderful,\u201d said Henrietta Lovell, the founder of the Rare Tea Company. Ms. Lovell, who supplies teas to exclusive restaurants, pointed out that tea had been used in China for medicinal purposes for thousands of years. \u201cThe more I learn about tea, the more fabulous and fascinating it becomes,\u201d Ms. Lovell said.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Dr. Francl believes that the new findings could eventually pave the way to a scalable method of making sure people aren\u2019t ingesting heavy metals. \u201cGiven that clean water is such a global issue,\u201d she said, \u201cif there was a way to take this proof of concept and tweak it to produce potable water at the end, that would be pretty good.\u201d<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6606220950177433\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- ItShrt World News -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n    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may<\/p>\n","protected":false},"author":1,"featured_media":9494,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[1730,341,1594,268,3359,611],"class_list":["post-9493","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science","tag-chemistry","tag-hazardous-and-toxic-substances","tag-metals-and-minerals","tag-research","tag-tea","tag-water"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Tea Leaves Can Steep Away Lead, Study Finds - World News<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/site.itshrt.com\/worldnews\/tea-leaves-can-steep-away-lead-study-finds\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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