Is it safe to use fiber-based grease-proof food packaging for hot takeout?

What's actually in it

Fiber-based food packaging is designed to resist grease, but that convenience comes with a chemical cost. Many of these containers are treated with PFAS (per- and polyfluoroalkyl substances). These are synthetic chemicals used to create a barrier against oil and water.

A 2026 study in J Agric Food Chem identified the presence of 6:2 fluorotelomer alcohol, a specific type of PFAS, in these fiber-based materials. When your hot takeout sits in these containers, these chemicals can move from the packaging into your food.

What the research says

Research confirms that these materials are a common source of chemical exposure. A 2026 study in Chemosphere assessed various consumer food packaging items and confirmed the widespread presence of PFAS. Because these chemicals are used to make the paper grease-proof, they are not just sitting on the surface; they are part of the material structure.

a 2026 study in Food Addit Contam Part A Chem Anal Control Expo Risk Assess highlights the difficulty in measuring the total amount of organic fluorine in these products. This means it is often hard to know exactly how much of these harmful substances you are being exposed to when you order takeout. Other 2026 research in Anal Bioanal Chem and J Hazard Mater emphasizes that even bio-based or biodegradable packaging can contain complex chemical profiles that require careful safety screening before we assume they are safe for our meals.