Environmental groups say a ban would protect consumers from the health effects of BPA that leaches from products including some soup cans. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

A Harvard study found dramatically higher BPA exposure in people who ate canned soup. The researchers used different varieties of Progresso-brand vegetable soups, but BPA is found in the epoxy resins used to coat the inside of many food and beverage cans. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR