Microplastics are damaging brains.
A recent study has raised concerns that microplastics, particularly in coastal areas, may negatively impact brain health. Marine microplastics—tiny plastic particles less than 5 millimeters in size—are linked to impairments in memory, thinking, and mobility. Researchers plan to present these findings at an upcoming American Academy of Neurology meeting, noting that individuals living in areas with high levels of microplastics in the ocean are also experiencing greater difficulties in self-care and independent living.
Led by Dr. Sarju Ganatra from Lacey Hospital and Medical Center, the study analyzed data from 218 coastal counties across the U.S., dividing them based on levels of microplastics in nearby waters. Counties with the highest microplastic pollution had more than 1,000 fragments per cubic meter, while low-pollution areas had fewer than 10. The research found that areas with higher levels of ocean microplastics saw a 9% increase in memory and thinking problems, as well as a 16% rise in self-care difficulties.
Although the study did not conclusively prove that microplastics directly cause these health issues, the researchers suggest that pollution may play a significant role in cognitive decline and neurological problems. They emphasize the need for more studies to explore this potential link between environmental factors and brain health.
Other research has shown that microplastic particles can travel through the bloodstream and even cross the blood-brain barrier. A separate study published in Nature found that human brains contain measurable amounts of microplastics, with dementia patients showing even higher concentrations. These findings highlight the growing concern over plastic pollution’s impact on human health, calling for further investigation.
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