Medical Discovery News, July 12, 2008 Saturday's edition of Medical Discovery News, by UTMB professors Norbert Herzog and David Niesel, focused on a chemical called Bisphenol-A or BPA.  Studies show BPA can "leach" from plastics especially "hard plastics" like polycarbonate. You find it in everything from baby and bike water bottles. While high doses of BPA given to animals may have no lasting effects, human exposure to low doses may. So what can you do to avoid BPA? First, limit exposure to BPA containing plastics if you're pregnant or have young children. Also avoid canned goods with plastic liners. Medical Discovery News airs at 10 a.m. on KUHF-FM in Houston. The program also airs on numerous radio stations across the country and in Mexico.