By CASC4DE July 23, 2025
A recent study conducted by researchers at the University of Notre Dame and the O’Neill School of Public and Environmental Affairs has revealed the widespread presence of per- and polyfluoroalkyl substances (PFAS) in reusable intimate hygiene products—raising new alarms for both consumer safety and environmental protection.
🧪 Published in Environmental Science & Technology Letters, the study analyzed 59 products, including menstrual underwear, washable pads, menstrual cups, and incontinence products, sourced from North and South America and Europe. The findings show that PFAS were present in all samples, with around 30% of them containing fluorine levels suggesting intentional use of these chemicals—likely for purposes such as stain resistance or waterproofing.
🔍 Fluorotelomers Dominate the Chemical Profile
Using targeted analyses of 42 specific PFAS compounds, researchers found a prevalence of fluorotelomer alcohols (FTOHs)—especially 6:2 and 8:2-FTOH. These substances are commonly used in consumer goods and are known to degrade into more persistent and toxic PFAS, raising questions about their use in products designed for intimate, repeated contact with human skin and mucous membranes.
📌 The authors underline the potential exposure pathway through dermal absorption, particularly concerning given the sensitive areas these products come into contact with. While current toxicological data on dermal uptake from such materials is still evolving, the presence of these compounds in close-contact applications is a clear cause for scrutiny.
🌊 Environmental Fallout: PFAS Released During Washing
Beyond health risks, the study highlights the environmental impact of laundering these textiles, which leads to the release of PFAS into wastewater systems. Given the persistence of PFAS and their resistance to degradation, this contributes to a vicious cycle of contamination—from production, to use, to environmental release.
❗ Not an Isolated Case
These findings build on previous research. A study published in March 2024 had already detected PFAS in the inner layers of menstrual underwear, including some products labeled as organic. Although contamination levels varied, this points to a systemic issue across product categories and material claims.
✅ A Glimmer of Hope: PFAS-Free Options Exist
In a notable silver lining, the researchers identified at least one product per category that did not contain intentionally added fluorine, demonstrating that it is technically feasible to manufacture reusable hygiene products without PFAS. This underscores the importance of transparency in manufacturing and the need for regulatory incentives to promote safer alternatives.