Teflon is not suspected to cause cancer in humans, but inhalation of fumes created by overheated Teflon pans can cause flu-like symptoms. Perfluorooctanoic acid, a chemical used in Teflon production, is linked to tumor production in animals.
Teflon is the brand name for polytetrafluoroethylene and is used to create nonstick cookware and some fabric protectors. While Teflon is not directly related to any significant health concerns, the chemicals used in manufacturing Teflon are hazardous in large concentrations. Certain manufacturing areas have large concentrations of perfluorooctanoic acid in the public water system as a result of contamination. In addition, people who wear clothing made from Teflon-treated fabrics have ongoing exposure.