Microplastics are everywhere — in our blood, guts, lungs and even brains. Researchers estimate we carry around 5g inside us, about a teaspoon’s worth.
Austrian scientists found that exposing gut bacteria to microplastics changed their balance and chemical output, mirroring patterns linked to depression and cancer. “Reducing exposure where possible is wise,” said Dr Christian Pacher-Deutsch.
These particles come from packaging, clothes, tyres and cosmetics. Some are small enough to enter organs and cells. “They’re in almost every tissue studied,” said Dr Jaime Ross, whose research found microplastics in mice caused brain changes resembling dementia.
Human studies now link plastic in arteries and brains to higher risks of strokes and cognitive decline. But experts stress caution — the science is new, and not all plastics act the same.
“Minimising exposure is probably beneficial overall,” said Prof Stephanie Wright. Encouragingly, older people don’t seem to carry more plastic than younger ones, suggesting the body may clear some over time.
How to Reduce Exposure
- Don’t heat food in plastic; use glass or metal.
- Try loose-leaf tea and wooden boards.
- Choose natural fabrics and check cosmetics for plastic ingredients.
- Avoid heavy-traffic areas to limit inhaling airborne particles.
We can’t avoid microplastics entirely — but every small change helps cut what ends up inside us.
