The Second Skin

Performance activewear meets every physical specification of a pharmaceutical drug delivery system — heat, occlusion, hydration, duration, and sub-500-Dalton chemistry — pressed against the widest vasodilated capillary surface the body has, with zero of the measurement requirements. In this episode, we debate: is the absence of dose data for PFAS dermal exposure during exercise evidence that the risk is manageable, or evidence that a regulatory system built on exemptions has left a void where the body meets the chemistry? We unpack 5 concepts you will need before reading the article: the Unregulated Transdermal Patch, the 500-Dalton Rule, the Polymer Exemption, the Three-Method Spread, and Direction versus Magnitude. This is the first episode of The Forever Problem, a three-part series on PFAS in performance activewear. This episode takes the body. Episode two takes the regulatory architecture. Episode three takes the money. Related episodes: The Accidental Patch, The Safe Substitute Topics: PFAS, activewear, dermal absorption, forever chemicals, transdermal delivery, leggings, performance fabric, DWR, 500 Dalton rule Read the full article: youreanatural.com/consumer-intelligence/the-second-skin