Do plastic food packages release chemicals above safety limits?

What's actually in it

Food packaging made from plastic contains a cocktail of chemical additives: plasticizers to keep it flexible, antioxidants to prevent degradation, UV stabilizers to block light damage, and slip agents to help food release from the package. Regulators restrict how much of these chemicals can migrate into food, but enforcement relies on testing that's rarely done on finished products at the store.

The longer food sits in plastic, especially under heat or light, the more chemicals migrate.

What the research says

A 2026 study in J Chromatogr A developed a method to test for 15 restricted substances in plastic-packaged food. The researchers applied it to foods bought directly from store shelves.

Multiple samples contained detectable levels of restricted chemicals, including phthalates, adipates, and antioxidant additives. In several cases, the levels exceeded specific migration limits set by European food safety regulations. The worst offenders were fatty foods like cheese, deli meats, and pre-made meals in flexible plastic packaging.

Fatty foods pull plasticizers out of packaging more aggressively than dry or water-based foods. The study also found that microwaving food in its original plastic packaging dramatically increased migration of all chemicals tested.

To protect yourself, transfer food from plastic packaging into glass or ceramic containers as soon as possible. Never heat food in its plastic tray or wrap. For fatty foods like cheese and deli meats, ask for them wrapped in paper at the counter instead of pre-packaged in plastic.