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MODULE 9

Serotonin — The Gut-Brain-Melanin Circuit

The Chemical That Connects Everything

Tracing the tryptophan pathway from gut production to skin receptor activation.

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Lessons

17
The Tryptophan Pathway
0:35
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18
Serotonin Receptors in Your Skin
0:47
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← Module 8: Brainstem Magnetite
Module 10: Melatonin →