Sept. 16, 2008 -- For the first time, the controversial plastic chemical bisphenol A has been linked to serious health problems -- heart disease and diabetes -- in people.
Bisphenol A, also called BPA, is used in polycarbonate plastic -- hard plastic used in products including some baby bottles and refillable water bottles -- and in epoxy resins, which line some canned goods and are also in dental composites and sealants. Bisphenol A isn't found in softer plastics, such as single-serving water bottles.
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From the liners in canned foods to some plastic water and baby bottles, the
chemical bisphenol A is found in many everyday products. But is it safe or not?
WebMD's comprehensive coverage of this issue can help you sort out the
The study doesn't prove that bisphenol A caused those problems. But the findings are "disturbing," says David Schardt, MS, senior nutritionist of the Center for Science in the Public Interest. The plastics industry, on the other hand, stands by bisphenol A's safety.
The findings, published in The Journal of the American Medical Association, were presented today at an FDA public hearing on bisphenol A. Here's what you need to know about the new bisphenol A study.
Bisphenol A Study Findings
Most bisphenol A studies have been done in lab tests on rodents. The new study is all about humans.
The researchers checked government data on heart disease, diabetes, and bisphenol A in 1,455 U.S. adults aged 18-74.
People with the highest urinary levels of bisphenol A were more than twice as likely to report ever being diagnosed with cardiovascular disease or diabetes, compared to people with the lowest urinary levels of bisphenol A. High urinary levels of bisphenol A were also linked to abnormal concentrations of liver enzymes.
To put the heart disease and diabetes findings in perspective, those conditions were relatively rare: 79 people reported a history of heart disease and 136 reported a history of diabetes.
The study didn't directly test bisphenol A to see if caused health problems, so it doesn't prove that bisphenol A was to blame.
Still, the results held regardless of factors including age, sex, race, smoking, and BMI (body mass index). But the researchers didn't adjust for all possible influences, including family history of heart disease or diabetes.