Alarming Levels of Microplastics Discovered in Human Brain Tissue, Linked to Dementia

These researchers discovered that the brain contains significantly higher levels of microplastics and nanoplastics than other organs, with concentrations up to 30 times greater than those found in the liver or kidney. Notably, individuals diagnosed with dementia had up to 5 times more of these plastics in their brains compared to those without the condition. This raises concern about the potential role of these particles in neurological disorders and underscores the need for more research into their long-term effects.

The report also emphasizes the rapid rise in brain microplastic concentrations over recent years, correlating with increasing environmental plastic pollution. The most concerning particles, those smaller than 200 nanometers, primarily made of polyethylene, have been found in cerebrovascular walls and immune cells, suggesting they can cross the blood-brain barrier. Scientists are therefore investigating whether these accumulated plastics contribute to neurodegenerative diseases such as dementia. While definitive causal links remain unproven, experts stress the urgency of studying exposure limits and potential mechanisms by which these particles impact brain function.

In response to their findings, the researchers advocate for practical strategies to reduce microplastic intake. Switching from bottled to filtered tap water, for example, could cut microplastic consumption by almost 90 percent. Other recommendations include avoiding plastic food storage, using glass or stainless steel containers, and refraining from microwaving food in plastic.

To read how people with microplastics in the plaque clogging their neck arteries have been shown to be far more likely to have a heart attack or stroke than people with plastic-free plaque, see this news story on our website.