Dr. Retha Newbold is a developmental reproductive biologist at the National Institute of Environmental Health Sciences, where she studies the effects of low doses of BPA on mice. She was a member of a panel of 38 scientists who published a report in the Journal Reproductive Toxicology in August that found that studies in mice suggested that BPA exposure could be harmful to humans.
Dr. L. Earl Gray is a research toxicologist at the Environmental Protection Agency. He was a member of the National Toxicology Program's BPA expert panel, which found "minimal concern" for BPA's ability to affect adult reproductive health.
Editor's Note: Dr. L. Earl Gray provided a summary response to viewer questions on BPA. Excerpts of his response are posted in the forum, but in some cases, no specific answer was provided.