Plastic Found Inside Human Brains

Neuropathologists discovered unidentified brown particles in human brain tissue, later identified as microplastics and nanoplastics. Subsequent studies confirmed their presence in brain tissue, noting higher concentrations than in the liver and kidneys. Samples from individuals with documented dementia showed elevated levels.

Further research in 2024 analyzed plaques from carotid arteries of surgical patients, finding microplastics and nanoplastics. Over a three-year follow-up, patients with these particles in their plaques faced a significantly higher risk of heart attack, stroke, or death. Plastic enters the body through ingestion and inhalation from various sources like food, water, synthetic materials, and tire fragments.

A recent study explored the impact of reducing plastic-associated chemicals, such as phthalates and bisphenols, often found in food packaging and consumer products. Across 211 healthy adults, everyone had detectable levels of these chemicals. However, a seven-day intervention involving a low-plastic diet and alternative kitchenware and personal-care products led to a sharp decrease in urinary chemical markers.

This intervention demonstrated that everyday plastic exposure is measurable and modifiable, intricately linked to our food system. While the trial did not establish long-term health improvements or the removal of embedded particles, it highlighted that individuals can take sensible steps to reduce exposure. Recommendations include avoiding heating food in plastic, using glass or steel for hot items, and minimizing single-use plastics.