This web article provides information on how you can learn more about the environmental estrogen bisphenol-A (BPA). Researchers are concerned that even at low levels, environmental estrogens may work together with the body’s own estrogen to increase the risk of breast cancer. BPA is used in certain hard plastics (polycarbonate plastic) and the lining of canned food and beverages. BPA can leach out of plastics and can liners with heat. This article tells you how to recognize products that contain BPA, how to minimize leaching from plastics with BPA, and alternative choices to plastics that contain BPA (e.g. using of stainless steel containers).