15 Aug 2023 --- Researchers working with the American Chemicals Society (ACS) have analyzed over 100 period products for fluorinated compounds, an indicator of potentially harmful per- and polyfluoroalkyl substances, or PFAS. Their results show that while PFAS are absent from many menstruation products, fluorine was identified in wrappers for numerous pads and some tampons. They warn that the compounds – which remain in the body for many years when absorbed into the body – might be accidentally or intentionally added to some types of menstruation products by manufacturers.