Butyl benzyl phthalate or BBP is a man-made chemical that is used in millions of products from lipstick and nail polish to plastics. Consumers come into contact with the chemical on a regular basis. Yet, BBP has been linked to an increased risk of developing breast cancer. Previously, BBP has been associated with birth defects, kidney problems, and infertility. The chemical mimicks the female hormone estrogen. Health advocates have called on the cosmetics industry to ban the chemical which is used to make products glossy. The plastics industry uses the chemical to make plastic softer. However, the health risks associated with BBP far outweigh any consumer advantage.