PFAS in Tampons: What Are "Forever Chemicals" and Why Do They Matter?
Per- and polyfluoroalkyl substances (PFAS) are a class of more than 12,000 synthetic chemicals that do not break down in the human body or the environment. Independent laboratory testing has detected PFAS in multiple tampon brands. The presence of these chemicals in products used internally on highly absorptive vaginal tissue is a central concern in the tampon contamination litigation.
Key Takeaways
- PFAS are synthetic "forever chemicals" — they do not break down naturally
- Over 12,000 individual PFAS compounds exist; many have not been studied for health effects
- The EPA has linked PFAS exposure to cancer, thyroid disease, immune suppression, and reproductive harm
- PFAS have been detected in tampon products through independent testing
- Vaginal absorption bypasses liver detoxification, potentially increasing systemic exposure
What Are PFAS?
PFAS (per- and polyfluoroalkyl substances) are a large group of manufactured chemicals that have been used in industry and consumer products since the 1940s. They are characterized by strong carbon-fluorine bonds, which make them extremely resistant to heat, water, grease, and chemical degradation. This persistence is why they are called "forever chemicals."
Common uses include non-stick cookware (Teflon), water-resistant clothing, food packaging, firefighting foam, and industrial applications. PFAS are also found in some cosmetics, personal care products, and — as recent testing has revealed — menstrual products including tampons.
Known Health Risks of PFAS Exposure
Sources: EPA, ATSDR, National Academies of Sciences (2022). These are associations found in epidemiological and toxicological studies, not definitive causation in all cases.
How Do PFAS Get Into Tampons?
PFAS may enter tampon products through several pathways: raw materials (cotton, rayon, or synthetic fibers that absorbed PFAS from contaminated soil or water during cultivation), manufacturing processes (industrial equipment, coatings, or processing chemicals), or packaging materials.
Because PFAS are ubiquitous environmental contaminants found in water, soil, and air, completely eliminating them from products is challenging. However, plaintiffs in the tampon lawsuits argue that manufacturers have a duty to test for these compounds and disclose their presence, particularly in products designed for internal use on absorptive mucous membranes.
In plain English: Why does PFAS in tampons matter?
PFAS are chemicals that never leave your body once they get in. They've been found in tampons. Because tampons are worn inside the body on tissue that absorbs chemicals directly into the bloodstream (without the liver filtering them first), this is considered a concerning route of exposure. Health agencies have linked PFAS to cancer, thyroid problems, immune system issues, and reproductive harm.
Sources & Citations
- [1]
- [2]
- [3]Per- and Polyfluoroalkyl Substances and Health Outcomes — National Academies of Sciences (2022)
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- [5]PFAS: Exposure, Effects, and the Path Forward — Environmental Health Perspectives (NIH) (2023)