- Presence of microplastics and nanoplastics in human brain tissue.
- Elevated concentrations detected in dementia patients.
- The need to better understand the routes of exposure, uptake, and clearance pathways of plastics in human tissues, particularly in the brain.
- Brain samples exhibited substantially higher concentrations of microplastics and nanoplastics compared to liver and kidney tissues.
- No correlation between total plastics and age.
- Total mass concentration of plastics in the brains analyzed in this study increased by approximately 50% in the past 8 years.
- Polyethylene comprised 75% of brain MNPs on average.
- Causality between MNPs and dementia cannot be established.
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