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2009年6月3日     收藏 打印 推荐 朗读 评论 更多功能 
“Gender-bending” fear
over plastic drinks bottles

  Drink from plastic bottles can raise the body’s levels of a controversial “gender-bending” chemical by more than two thirds, according to tests.

  Experts have been concerned about the possible health effects of bisphenol A (BPA) —— an everyday chemical used in many plastic food and drink containers and tins as well as clear baby bottles —— which is officially classified as toxic in some countries.

  Researchers from Harvard School of Public Health studied 77 students, who had first undergone a seven-day “washout” phase in which they drank all cold beverages from stainless steel bottles in order to minimise BPA exposure. They were then given two polycarbonate bottles and asked to drink all cold beverages from them during the next week. Previous studies have suggested that high levels of BPA consumption are linked to birth defects, growth problems and an increased risk of heart disease and diabetes.

  The senior author of the latest study, Karin B. Michels, associate professor of epidemiology at HSPH and Harvard Medical School, said: “We found that drinking cold liquids from polycarbonate bottles for just one week increased urinary BPA levels by more than two-thirds.”

  “If you heat those bottles, as is the case with baby bottles, we would expect the levels to be considerably higher. This would be of concern since infants may be particularly susceptible to BPA’s hormone gland-disrupting potential.” Canada banned the use of BPA in polycarbonate baby bottles last year and some manufacturers have voluntarily eliminated it from their products.

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钱江晚报 国际新闻·双语 B0011 “Gender-bending” fear
over plastic drinks bottles
2009-6-3 钱江晚报b00112009-06-0300015 2