Microplastics are everywhere—in our water, food, and even the air we breathe. A new scientific review highlights a growing concern: microplastics and nanoplastics are accumulating in human brain tissue. Researchers are now investigating what this could mean for brain health and how we can reduce our exposure.
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Tiny Particles, Big Questions
A recent commentary published in Brain Medicine explores new evidence showing that human brains contain significant amounts of microplastics (about a spoon's worth). The findings, originally presented in Nature Medicine, reveal that people with dementia have three to five times more microplastics and nanoplastics in their brains than those without. Even more striking, brain tissues contain seven to thirty times more microplastics than other organs like the liver or kidney.
How does dementia differ from Alzheimer's disease? - (Universal-Sci)
Dr. Nicholas Fabiano from the University of Ottawa notes that the increase in brain microplastic concentrations has been dramatic over the past eight years, closely mirroring the rise in environmental plastic pollution. One key concern is that tiny particles—particularly those smaller than 200 nanometers—can cross the blood-brain barrier, potentially affecting neurological health.
Brains contain about a spoonful of microplastics and nanoplastics - Image Credit: Andrzej Rostek via Shutterstock / HDR tune by Universal-Sci
Can You Reduce Your Exposure?
While researchers are still working to understand the full health effects of microplastic accumulation, there are simple ways to reduce exposure. The commentary highlights that switching from bottled water to filtered tap water can cut microplastic intake by nearly 90%. Dr. Brandon Luu from the University of Toronto points out that plastic tea bags and heating food in plastic containers also contribute significantly to exposure. Using glass or stainless steel alternatives for food storage and preparation can help minimize plastic intake.
Research Finds a Shocking Amount of Previously Undetected 'Nanoplastics' in Bottled Water - (Universal-Sci)
There is also early evidence suggesting that sweating may help the body eliminate some plastic-derived compounds, though more research is needed to confirm how effectively our bodies can remove these particles.
What Comes Next?
The authors of the commentary emphasize the urgent need for large-scale human studies to determine how microplastic exposure affects long-term health. They call for clear guidelines on safe exposure levels and strategies for minimizing accumulation in the body.
As research continues, one thing is clear: small lifestyle changes can make a difference in limiting daily exposure to microplastics. While scientists work to understand the full impact on human health, reducing unnecessary plastic use remains a practical step forward.
If you are interested in more details, be sure to check out the full commentary listed below.
Sources, further reading and related articles:
Human microplastic removal: what does the evidence tell us? (Brain Medicine)
Playing brain-stimulating games may slow the onset of Alzheimer's dementia - (Universal-Sci)
Dutch scientists may have solved the missing plastic paradox - (Universal-Sci)
Study Finds Link Between Daytime Sleepiness and Early Signs of Dementia - (Universal-Sci)
Research Finds a Shocking Amount of Previously Undetected 'Nanoplastics' in Bottled Water - (Universal-Sci)
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