A recent U.S. Food and Drug Administration (FDA) study found nanograms of bisphenol A (BPA) in 71 of 78 canned foods tested. Gregory O. Noonan, et al., “Concentration of Bisphenol A in Highly Consumed Canned Food in the U.S. Market,” J. Agric. Food Chem., May 20, 2011. BPA is used to make epoxy coatings to protect canned foods and has been banned in the European Union and several U.S. states.

According to the study, the BPA concentrations detected ranged from 2.6 nanograms per gram of food (ng/g) to730 ng/g. The tested products apparently represented 16 different food types from canned-food classifications that constitute approximately 65 percent of U.S. canned-food sales and canned-food consumption. Large variations in BPA concentrations were found among different products of the same food type and among different lots of the same products.