Recent studies have uncovered alarming levels of microplastics accumulating in human bodies, with concentrations varying by age. These tiny plastic particles, less than 5 millimeters in size, originate from degraded plastic products and have been detected in various human tissues, raising significant health concerns.
Microplastics have been found in human blood, lungs, liver, kidneys, and even the brain. A 2025 study revealed that cadaver brain samples contained microplastic levels seven to thirty times higher than those found in the kidneys and liver. The accumulation in the brain is particularly concerning due to its potential impact on neurological health.
Research indicates that microplastic accumulation increases with age. Older adults tend to have higher concentrations due to prolonged exposure over time. However, children are not exempt; studies have shown that children have a cancer risk from microplastic exposure estimated at 1.13 × 10⁻⁵, which is higher than the recommended threshold.
The presence of microplastics in the body is linked to various health issues. They can cause inflammation, oxidative stress, and disrupt cellular processes. Notably, microplastics are suspected to contribute to the rising incidence of colorectal cancer among young adults under 50. These particles may damage the gut lining and alter the microbiome, potentially promoting cancer development.
While it’s challenging to eliminate microplastic exposure entirely, certain measures can help reduce intake:
- Avoid microwaving food in plastic containers.
- Use glass or metal alternatives for food and beverage storage.
- Limit consumption of bottled water.
- Be cautious with seafood, especially shellfish, which can contain higher microplastic levels.
As research continues to explore the full impact of microplastics on human health, these findings underscore the importance of mitigating exposure to these pervasive pollutants.
