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Gut Feeling

Gastropod

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The Vaguest Nerve

90 to 95 % of all the seratonin in our body comes from bacteria in our guts. Seratonin is sloshing around in both our an and our guts. Some is home made, some is microbe made. It's doing its different thing in each place. So far, so good. But how are these two separate saratone and situations even connected? These two organs, while far apart in the body, arise from the exact same cells in the human embryo. They remain connected throughout life by the vaguest nerve.

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