This feel-good hormone plays a key role in everything from sleep and digestion to happiness and contentment—here's how to keep it flowin'. Serotonin is a “feel-good” hormone, or neurotransmitter, that ...

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 ...