Even ‘Microwave Safe’ Plastic Containers Can Release Microplastics Into Meals, New Study Warns
February 25, 2026 | Source: Independent | by Stuti Mishra
Microwaving a ready meal in its plastic tray can release thousands of microscopic plastic particles into the food within minutes even when the packaging is labelled “microwave-safe”, according to a new analysis.
The analysis, published by Greenpeace International on Tuesday, is based on peer-reviewed studies examining what happens when plastic food containers are heated.
It says that heat can trigger the release of both microplastics and nanoplastics, particles so small they are invisible to the naked eye. It also releases chemicals like bisphenols and phthalates used in plastic manufacturing which research links to hormone disruption, infertility and certain cancers.