Styrene Is Leaching From Your Takeout Containers Into Food

That styrofoam cup, that takeout container, that deli tray: they're all leaching styrene into your food. Styrene is classified as a possible human carcinogen, and it's migrating from the packaging into what you eat and drink.

What the Study Found

A 2026 study in Food Chemistry analyzed styrene migration from food contact materials. The research documents how styrene moves from polystyrene packaging into food, especially under real-world conditions like heat, fat content, and storage time.

Hot coffee in a styrofoam cup? Styrene migrates faster with heat. Oily food in a polystyrene takeout box? Styrene is fat-soluble, so fatty foods pull more of it out of the container. The longer your food sits in that container, the more styrene it absorbs.

What Styrene Does to You

Styrene is classified as "possibly carcinogenic to humans" by the IARC. It affects the nervous system, with occupational exposure linked to headaches, fatigue, and cognitive problems. Chronic low-level exposure from food packaging hasn't been studied enough, but the fact that it migrates into food at all is the problem.

What You Can Do

Never put hot food or drinks in styrofoam. Transfer takeout to glass or ceramic containers immediately. Avoid polystyrene containers entirely when you can. Bring your own food containers when ordering takeout.

Check out our non-toxic kitchen alternatives for safe food storage.

Also see glass food containers for safer alternatives.

Source: Norte TG, Ramos F, Nerín C, Silva AS (2026). Food Chem.