Can microplastics in your body stop immune cells from cleaning up dead cells?

What's actually in it

Every day, billions of cells in your body die and get replaced. Normally, immune cells called macrophages gobble up the dead cells before they cause trouble. This cleanup process is called efferocytosis. If it fails, dead cells pile up and release toxic contents that trigger chronic inflammation.

Polystyrene microplastics from foam food containers, disposable cups, and packaging can enter your bloodstream through your gut. Once inside, they interact with immune cells throughout the body.

What the research says

A 2026 study in Part Fibre Toxicol found that polystyrene microplastics disrupt efferocytosis. When macrophages tried to clean up dead cells in the presence of microplastics, they couldn't do their job properly.

The microplastics physically interfered with the macrophages, making it harder for them to grab and digest dead cells. They also scrambled the chemical signals macrophages use to find and target cellular debris.

With cleanup stalled, dead cells accumulated. Their toxic contents leaked out and triggered an inflammatory chain reaction. This kind of sterile inflammation, where no infection is present, is linked to conditions like atherosclerosis, autoimmune disease, and organ damage.

This study helps explain why microplastic exposure is connected to so many different health problems. It's not just about one organ. It's about a basic immune function that protects your whole body being thrown off by plastic particles.

Reducing polystyrene in your daily routine helps. Use reusable containers, avoid foam cups, and skip plastic-wrapped foods when you can.