Microplastics are everywhere — in our blood, lungs, guts and even our brains. Scientists estimate the average person carries about 5g of them inside. What this means for our health remains uncertain, but new evidence suggests they could disrupt our gut and brain.
A study from the University of Graz found that microplastics changed gut bacteria in ways linked to depression and cancer. “Reducing exposure is a wise precaution,” said lead researcher Dr Christian Pacher-Deutsch.
Microplastics come from packaging, clothes, tyres and cosmetics, and are small enough to enter our organs. Studies on mice show they can alter brain chemistry and behaviour. In humans, they’ve been found in arteries and brains, possibly increasing heart and dementia risks.
Scientists warn, though, that it’s too soon for firm conclusions. “We don’t yet know which plastics are most harmful or how,” said Prof Stephanie Wright of Imperial College London.
Still, many researchers are changing habits. “Avoid heating food in plastic, switch to glass or steel, and choose natural fabrics,” said Wright. Small changes, they say, can reduce exposure — and maybe help our bodies heal from the plastic within.
