Microplastics Are Accumulating in Human Brains at Alarming Levels — And the Link to Dementia and Heart Disease Is Growing Clearer

A May 2026 study found microplastics in human brains at 7–30x levels vs. other organs, with a 50% rise since 2016. Dementia patients had the highest levels. Arterial plaque microplastics linked to 4x heart attack risk.