Microplastic accumulation in human brain shows significant increase

Recent scientific research highlights the increasing accumulation of microplastics and nanoplastics within the human body, specifically targeting the brain. A study led by toxicologist Matthew Campen at the University of New Mexico analyzed brain, liver, and kidney tissues from deceased individuals using pyrolysis-gas chromatography.

The findings revealed a significant increase in plastic concentration in brain tissue over time. Comparing samples from 2016 to 2024, researchers observed a nearly 50% increase in the median concentration of micro and nanoplastics, rising from approximately 3.345 micrograms per gram of tissue to 4.917 micrograms per gram. This trend was not attributed to age, sex, or ethnicity, suggesting a link to rising global plastic pollution.

Other research, including work from the University of York, emphasizes that microplastics enter the human body through contaminated water, seafood, and salt. These particles can infiltrate the blood-brain barrier and have been shown to cause cellular damage. Studies have detected plastic particles in 93% of bottled water samples and in human feces globally, contributing to a continuous cycle of ingestion through the food chain.