Summary from the original article

Your brain is protected by the blood-brain barrier—a network of cells in the brain's blood vessels that serves as a border between the brain and the rest of your bloodstream. But it's not just a barrier; it's a sophisticated interface that shuttles specific molecules between the blood and the brain to keep your brain healthy.
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Upgrade this serverYour brain is protected by the blood-brain barrier—a network of cells in the brain's blood vessels that serves as a border between the brain and the rest of your bloodstream. But it's not just a barrier; it's a sophisticated interface that shuttles specific molecules between the blood and the brain to keep your brain healthy.
6 hours ago · medicalxpress.com · You are reading this one