Are grease-proof food containers a PFAS concern?
Yes. A 2026 consumer-products study found fluorine in 61% of tested food contact materials and hidden PFAS precursors after TOP assay testing.
What's actually in it
Some food containers and wrappers are treated to resist water or grease. That treatment can involve PFAS, a large class of persistent fluorinated chemicals. PFAS can be hard to spot because targeted tests only look for known chemicals on a list.
The biggest concern is repeat contact with hot, oily, or greasy food. That is when glass and stainless steel make more sense than coated disposable packaging or mystery plastic containers.
What the research says
A 2026 study in Chemosphere tested impregnation products, textiles, and food contact materials for PFAS. The researchers found total fluorine in 61% of food contact materials. After using a modified TOP assay, targeted PFAS levels rose sharply, which showed hidden PFAS precursors that a normal targeted test missed.
This study did not prove that every recycled or cheap online container is contaminated. It did show that water- and grease-proof food contact materials can contain PFAS chemistry beyond the usual watchlist. For home food storage, choose glass jars, glass containers, or stainless steel. Use plastic less for hot, oily, or acidic food.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Beyond the watchlist: How the TOP assay exposes untargeted PFASs for current and future regulations in consumer products. | Chemosphere | 2026 |