Is it safe to eat drive-through fried food in grease-proof paper regularly?
No. Grease-proof paper is still coated with fluorotelomer PFAS.
What's actually in it
Fast food wrappers, fry bags, and burger liners use grease-proofing treatments. For decades, those were PFAS coatings (PFOA and cousins). A handful of major chains announced phase-outs around 2020. New testing in 2026 shows the switch isn't universal: 6:2 fluorotelomer alcohol, a short-chain PFAS, is still used in fiber-based food packaging.
The fluorotelomer is "newer" PFAS, not no PFAS. It clears the body faster than PFOA did, but still accumulates in blood with regular exposure.
What the research says
A 2026 study in J Agric Food Chem validated a direct mass spectrometry method to screen for 6:2 fluorotelomer alcohol in fiber-based food packaging. The method detected the chemical in a meaningful fraction of fast-food and takeout wrappers tested. "PFAS-free" labels didn't always match the actual lab results.
Realistic rule: eat fast food less often, and when you do, skip the wrapper. Order sandwich-free versions (burger patties, fries in-cup). Take the food out of the wrapper and put it on a real plate as soon as you get home. Chipotle, Panera, and Cava are among the chains that have been more aggressive about PFAS removal; still verify rather than assume. The home version of any fast food, made in the oven on parchment or stainless, is the cleanest version.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Validating Direct Mass Spectrometry Screening for Grease-Proofers Containing 6:2 Fluorotelomer Alcohol in Fiber-Based Food Packaging. | J Agric Food Chem | 2026 |
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