BPA stands for bisphenol A, an industrial chemical that is found in polycarbonate plastics and epoxy resins. Several toxic effects have been linked to BPA in the past, including infertility, IBS, vitamin D deficiency, and cancer according to
Dr. Josh Axe. If a product isn't labeled, the
Mayo Clinic notes that some, but not all, plastics marked with recycle code 3 or 7 may contain BPA.