Study Finds Increasing Microplastic Accumulation in Human Brains

New research reveals rising levels of microplastics in human brain tissue, with potential links to dementia, though causation remains unproven.

A study published in Nature Medicine found significantly higher concentrations of microplastics in human brain tissue compared to other organs like the liver and kidneys.
Researchers analyzed tissue samples from 24 individuals in 2024 and compared them to samples from 2016, observing a marked increase in microplastic levels over time.
Brain samples from individuals diagnosed with dementia showed particularly high concentrations of microplastics, though no direct causal link has been established.
Polyethylene, commonly used in plastic packaging, was the most prevalent type of plastic found, constituting up to 75% of the microplastics in brain tissue.
Scientists emphasize the need for larger, long-term studies to better understand the health implications of microplastic accumulation in the brain.