Bisphenol A (BPA) is a chemical substance used in plastics that are used in, for example, construction material, electronics, plastic bottles, food packaging materials, implants, medical syringes and toys. All consumers are exposed to some extent to BPA. Exposure is generally below the current European standard.

The BPA exposure of workers in factories, cashiers, and premature babies and young children undergoing prolonged medical treatment is sometimes above the norm. Recent indications of possible adverse effects on the immune system as a result of exposure before birth and in the early years are cause for concern for exposure of young children and women who are pregnant or breastfeeding.