Bisphenol A (BPA) is a chemical commonly used in manufacturing polycarbonate plastics and epoxy resins. It is found in products like water bottles, food containers, and the linings of metal cans. Concerns about BPA arise from its classification as an endocrine disruptor, meaning it can interfere with hormone functions. Exposure to BPA has been linked to various health issues, including an increased risk of certain types of cancer.