Can polystyrene microplastics raise heart and lung concerns?
Use caution with repeated polystyrene exposure, especially around hot food. A 2026 Tissue and Cell mouse study found 60 days of oral polystyrene microplastic exposure changed heart and lung markers linked with oxidative stress, inflammation, and tissue injury.
What is actually in it
Polystyrene is used in some foam cups, trays, and takeout containers. Microplastics are tiny pieces of plastic that can form as plastic wears down.
The highest-contact food uses are hot meals, oily foods, long storage, and reheating in disposable containers.
What the research says
A 2026 Tissue and Cell study exposed male Swiss mice to polystyrene microplastics by mouth for 60 days. The study found changes in heart and lung tissues, including lower antioxidant enzyme activity, higher lipid peroxidation, higher cardiac injury markers, more inflammatory cytokines, and histology changes.
The same study looked at taurine as a protective compound, but that does not make taurine a household fix. This is animal evidence, not direct proof that one food container damages a person.
What to do at home
Use glass, stainless steel, or ceramic for reheating. Do not microwave foam takeout containers.
Let food cool before moving it into plastic. Retire plastic containers that are scratched, warped, cloudy, or sticky.