PFAS: The 'Forever Chemicals' in Your Kitchen, Clothes, and Cosmetics
Summary
PFAS — per- and polyfluoroalkyl substances — are in non-stick cookware, food packaging, outdoor clothing, and some cosmetics. The IARC classified PFOA as a Group 1 carcinogen in 2023. Here's what the evidence shows and how to reduce exposure when shopping.
PFAS: The 'Forever Chemicals' in Your Kitchen, Clothes, and Cosmetics
PFAS — per- and polyfluoroalkyl substances — are a family of over 12,000 synthetic chemicals that have one defining property in common: they do not break down in the environment or in living organisms. They accumulate in soil, water, wildlife, and human tissue over time, which is why scientists and regulators have termed them forever chemicals.
This guide covers what PFAS are, what the current evidence says about health and environmental impact, which regulatory actions have been taken, and how to reduce exposure through informed purchasing.
Note: This article provides consumer shopping guidance. It is not medical advice. Consult a healthcare professional for personal health concerns.
What Are PFAS?
PFAS encompasses thousands of individual compounds, all characterised by chains of carbon-fluorine bonds — one of the strongest bonds in organic chemistry, which explains their extraordinary persistence. Key subgroups include:
- PFOA (perfluorooctanoic acid) — used historically in non-stick cookware manufacturing (Teflon production)
- PFOS (perfluorooctane sulfonate) — used in fabric treatments, fire-fighting foams
- PTFE (polytetrafluoroethylene) — the solid non-stick coating itself; distinct from PFOA used in its manufacture
- Short-chain PFAS — developed as replacements for PFOA/PFOS; under increasing scrutiny
- Fluorinated polymers in cosmetics — used for film-forming, water resistance, and texture properties
Where PFAS Appear in Consumer Products
| Category | Typical PFAS Source | Notes |
|---|---|---|
| Non-stick cookware | PTFE coating; historically PFOA in manufacturing | PFOA banned; PTFE itself is chemically stable at normal cooking temperatures |
| Food packaging | Grease-resistant coatings on microwave popcorn bags, fast food wrappers | Under active regulatory restriction in EU and US |
| Outdoor/waterproof clothing | DWR (durable water repellent) treatments | Many brands now offer PFC-free alternatives |
| Cosmetics | Film-forming agents, waterproofing in mascara, foundation, blush | EU restriction progressing; US FDA reviewing |
| Stain-resistant textiles | Upholstery, carpet treatments | Bluesign and OEKO-TEX certifications now restrict PFAS |
| Drinking water | Industrial contamination near manufacturing/military sites | EPA set first enforceable limits in 2024 |
The Evidence on Health Impacts
PFAS research is an active and rapidly evolving field. The evidence base is strongest for PFOA and PFOS — the legacy compounds studied longest. For the thousands of newer replacement PFAS, data are more limited.
Established associations in peer-reviewed literature (primarily for PFOA/PFOS):
- Thyroid disruption — Several epidemiological studies have found associations between PFOA/PFOS blood levels and altered thyroid hormone levels. A 2018 review in Environmental Research examined 12 studies and found consistent associations.
- Immune effects — A 2020 report from the National Academies of Sciences, Engineering, and Medicine (NASEM) identified reduced vaccine response in children as among the strongest health outcomes associated with PFAS exposure.
- Cancer — The IARC classified PFOA as a Group 1 carcinogen (sufficient evidence in humans) in 2023, based on associations with kidney cancer and testicular cancer.
- Lipid and cholesterol effects — Elevated cholesterol is among the better-established associations with PFOA/PFOS exposure in human studies.
- Reproductive outcomes — Some epidemiological studies show associations with reduced fertility and changes in birth weight; evidence is considered suggestive but not definitive for most endpoints.
Important caveats:
- Most human health data are from populations with elevated PFAS exposure (e.g., near industrial sites or via contaminated water)
- General population exposure from typical consumer products is lower
- Establishing causation (vs. association) is methodologically difficult in population studies
- Legacy PFAS (PFOA, PFOS) data should not automatically be extrapolated to the thousands of newer PFAS compounds
Regulatory Responses
EU:
- PFOA and PFOS are banned under REACH (Persistent Organic Pollutants Regulation)
- The European Chemicals Agency (ECHA) received a universal PFAS restriction proposal in 2023 covering thousands of PFAS applications — the largest chemical restriction ever proposed in the EU
- The EU Cosmetics Regulation is advancing restrictions on intentionally added PFAS in cosmetics
- EU Food Contact Materials regulation is restricting PFAS in food packaging
US EPA:
- PFOA and PFOS listed as hazardous substances under CERCLA (Superfund) in 2024
- In April 2024, the EPA set the first-ever enforceable Maximum Contaminant Levels (MCLs) for six PFAS in drinking water, including PFOA and PFOS at 4 parts per trillion (ppt)
- State-level cosmetic PFAS restrictions: California AB 2771 (2022) bans intentionally added PFAS in cosmetics from 2025
International:
- PFOA and PFOS are listed under the Stockholm Convention on Persistent Organic Pollutants — a global treaty committing signatory nations to eliminate or restrict them
PFAS in Cosmetics: What to Look For
Cosmetics are a lower-volume PFAS exposure source than food, water, or occupational exposures — but they remain relevant for consumers making informed choices.
Ingredients that may indicate PFAS presence in cosmetics:
- Any ingredient starting with "perfluoro" or "polyfluoro"
- PTFE (polytetrafluoroethylene) — used in powders, foundations
- Fluoropolymer — film-forming agent
- Bis-PEG/PPG-18/18 Dimethicone — some dimethicone variants contain fluorine; check with manufacturer
What does not indicate PFAS:
- Silicones (dimethicone, cyclopentasiloxane) — silicon-oxygen compounds, not fluorinated
- General "smooth" or "glide" texture claims — these do not specifically indicate PFAS
How to shop for lower PFAS exposure in cosmetics:
- Look for "PFAS-free" or "fluorine-free" on packaging
- Choose products with California-compliant formulations (AB 2771 compliance from 2025)
- Look for Bluesign or OEKO-TEX MADE IN GREEN on clothing/textiles for PFAS-free fabric treatments
Practical Steps to Reduce Exposure
- Cookware: Cast iron, stainless steel, and ceramic-coated cookware are PFAS-free alternatives. If you use PTFE non-stick cookware, avoid heating above 260°C (500°F) where breakdown can begin — relevant for very high-heat cooking.
- Food packaging: Reduce microwave popcorn; use parchment paper (unbleached) rather than PFAS-treated food wrap where possible; choose stainless steel or glass food storage.
- Clothing: Many major outdoor brands now offer PFC-free (per/polyfluorocarbon-free) waterproof alternatives. Look for labels specifically stating "PFC-free DWR."
- Water: If you are in an area with known PFAS contamination, an NSF/ANSI 58-certified reverse osmosis filter or NSF/ANSI 53-certified activated carbon filter will reduce PFAS in drinking water.
- Cosmetics: Use ScoreKart to scan products for fluoropolymers and PFAS-related ingredients before purchasing.
ScoreKart flags PTFE, fluoropolymers, and other PFAS-associated ingredients in scanned cosmetic and food products, along with their current regulatory status.
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