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Cap's Off of Plastic Chemical Concerns

Government Scientists Voice Concern About Bisphenol A, but Stop Short of Making Recommendations
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WebMD Health News
Reviewed by Louise Chang, MD

April 15, 2008 -- Government scientists today weighed in on possible health risks linked to the plastic chemical bisphenol A -- and in some cases, they note higher risk than their advisory panel.

That news comes amid media reports that Canada's government may soon classify bisphenol A as a dangerous substance. The chemical, found in polycarbonate plastic, is used in a range of food containers, from baby and water bottles to the resins that line metal food cans.

Today's U.S. report doesn't go that far; it doesn't make any recommendations about bisphenol A. What the report does say is that government scientists have "some" concern about bisphenol A's effects, while a previous report voiced "minimal" concern about those potential effects.

"We're certainly not out to alarm people," Michael D. Shelby, PhD, director of the National Toxicology Program's Center for the Evaluation of Risk to Human Reproduction, tells WebMD.

"If people are concerned about it, there are ways they can reduce their exposure to bisphenol A, and if they feel it's necessary they should take those steps," says Shelby, who headed the group of government scientists that issued today's draft report.

What the Report Found

Today, the NTP posted a draft of its own report on bisphenol A. It based its findings in part on research conducted by an expert panel for the NTP that was published last year along with new scientific research published since the expert panel did its work, and public comments on the expert panel's review.

Shelby says while they largely agreed with the expert panel, which was convened by the Center for the Evaluation of Risk to Human Reproduction, they broadened the areas they felt could be of "some" concern, including effects on the mammary gland, prostate gland, and acceleration of puberty in females.

Both groups agreed that there already was some concern that exposure to the chemical could cause neural and behavioral effects in fetuses, infants, and children.

The evidence -- which came from studies on rodents, not people -- was "very limited," Shelby says. "But our conclusion was that we couldn't dismiss the possibility that similar effects might occur in humans."

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