Bisphenol A, a chemical used in the lining of canned goods and in plastic baby bottles and many water bottles, has come under fire recently as a growing body of scientific evidence shows that the compound may be harmful to humans. One new study shows that people with high levels of BPA are more than twice as likely to develop heart disease and diabetes. Dr. Nira Ben Jonathan of the University of Cincinnati College of Medicine just published a new study that looks at the effects of BPA on humans. As she tells host Bruce Gellerman, she found that when low levels of BPA are added to human fat tissue, it suppressed a hormone that regulates insulin.