why can’t we get past the blood brain barrier to cure certain diseases
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Imagine your brain is like the President’s house, and the blood-brain barrier is like a super strong gate that only allows important people to enter, just like the good nutrients and oxygen that your brain needs to stay healthy.
Now, if a stranger wants to get inside the house, the super strong gate won’t open unless they know the harm this stranger can cause. It’s the same with our blood-brain barrier; it won’t allow anything strange to enter without having any prior knowledge. The gate of the blood-brain barrier is very selective and doesn’t let many things pass through. This makes it difficult for medicines or treatments to reach the brain and fix the problem.
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