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Serotonin is a neurotransmitter, a chemical that moves back and forth in the space (called the synapse) between two nerve cells, or neurons. When one neuron is ready to send a message to another, it ...

Humans need to produce serotonin since it has an impact on both the body and the brain. A neurotransmitter and hormone, serotonin is crucial for blood clotting, digestion, mood management, sleep, and ...