Can biodegradable food-container microplastics affect gut health in mice?
In mice, yes. A 2025 study found PLA and PE microplastics from food containers altered metabolism, gut bacteria, liver tissue, and intestinal tissue.
What is actually in it
Some biodegradable food containers use PLA, a plant-based plastic. Conventional containers often use plastics such as PE.
Biodegradable describes how a material may break down under certain conditions. It does not prove that the material is better for food contact.
What the research says
A 2025 study in J Hazard Mater exposed mice to irregularly shaped PE microplastics and PLA microplastics from food containers for 4 weeks.
Both groups showed changes in metabolism and gut bacteria. The PLA group had stronger lipid-metabolism effects, and both PE and PLA exposure caused liver and intestinal tissue damage in mice.
This was an animal study. For daily food storage, glass containers are the simpler swap because they avoid plastic particles from both conventional and biodegradable containers.