Perfluorooctanoic acid (PFOA) is a synthetic chemical belonging to the class of per and polyfluoroalkyl substances (PFAS). These human-made chemicals are characterized by their strong carbon-fluorine bonds, making them highly resistant to heat, water, and oil. PFOA has been widely used in the manufacturing of various consumer products, including non-stick cookware, waterproof fabrics, and, notably, the lining of microwave popcorn bags.