Microplastics are also increasingly being found throughout the human body. We are not sure how they got there, though there are three probable routes. We may ingest microplastics when we eat and drink, or breathe them into our lungs, or absorb them through our skin. Another route has recently been suggested, whereby microplastics get up our noses and from there into our brains.
New research has suggested that the blood-brain barrier has at least one vulnerable spot where microplastics may be able to get into the brain. This potential entry point was suggested by researchers at the Freie Universität Berlin and the University of São Paulo. It is in the nose, where there are special nerves, the olfactory nerves, that detect smells.
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