Scientists Find Growing Levels Of Microplastics In Human Brains
Researchers have detected increasing levels of microplastics in the human brain, with concentrations rising roughly 50% between 2016 and 2024, according to a new study published in Nature Medicine. The findings suggest these tiny plastic fragments may be infiltrating deeper into the body than previously understood.
Scientists analyzed brain, liver, and kidney tissue from autopsies conducted in recent years and found significantly higher levels of microplastics in the brain. In some cases, the amount of plastic in brain tissue equaled the weight of a plastic spoon.
The study also revealed that individuals diagnosed with dementia had three to five times more microplastics in their brains than those without the condition. While researchers caution that this does not prove a causal relationship, the link raises concerns about potential neurological impacts.
Microplastics originate from the breakdown of plastic products such as containers, packaging, and clothing. These particles have been detected in human blood, lungs, and even placentas. Scientists now believe they can cross the blood-brain barrier, possibly through food or inhalation.
Among the various types of plastics found in brain tissue, polyethylene—commonly used in bags, bottles, and food packaging—made up the majority. Researchers also discovered that microplastics in the brain tend to be thin, sharp fragments rather than rounded particles, which could affect how they interact with tissue.
As microplastic pollution continues to grow worldwide, scientists are calling for further research into its potential health effects, as well as strategies to reduce exposure.
