WEEKS after its own advisory board accused the Food and Drug Administration of failing to adequately consider research about the dangers of bisphenol-A, found in many plastic baby bottles, plastic food containers and metal can linings, the agency has agreed to reconsider the issue.

The F.D.A.’s draft risk assessment in August, finding the chemical safe as it is now used, stood out against a tide of recent scientific opinion. The National Toxicology Program, part of the Department of Health and Human Services, has said there was reason to be concerned that BPA, as the chemical is called, could harm the brain, behavior and the prostate gland in fetuses, infants and children. Canada added the chemical to its list of toxic substances this year and has said it will ban BPA from polycarbonate baby bottles.

In September, a study published in the Journal of the American Medical Association found that adults with high levels of BPA in their urine were more prone to heart and liver disease and diabetes.

More than 200 animal studies have linked ingesting minute amounts of the substance to a range of reproductive problems, brain damage, immune deficiencies, metabolic abnormalities, and behavioral oddities like hyperactivity, learning deficits and reduced maternal willingness to nurse offspring.