Greenpeace International
24 Feb 2026

Amsterdam – Heating plastic-packaged ready meals and takeaways in the microwave or oven can release hundreds of thousands of micro- and nanoplastic particles along with a cocktail of toxic chemicals directly into food, according to a new Greenpeace International analysis of peer-reviewed science.

The report, Are We Cooked? The Hidden Health Risks of Plastic-Packaged Ready Meals, reviewed 24 recent scientific studies and finds that convenience food items marketed as “safe-to heat” are in fact potentially exposing millions of people to invisible contaminants every day.

Graham Forbes, Global Plastics Campaign Lead from Greenpeace USA, said:

“People think they’re making a harmless choice when they buy and heat a meal packaged in plastic. In reality, we are being exposed to a cocktail of microplastics and hazardous chemicals that should never be in or near our food. Governments have let the petrochemicals and plastics industries turn our kitchens into testing labs. This report shows that corporate claims of “microwave-safe” are no more than wishful thinking.”

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