5-Hydroxytryptamine (5-HT)

5-Hydroxytryptamine (5-HT), commonly known as serotonin, is a neurotransmitter, a chemical messenger in the body that helps transmit signals between nerve cells. It plays a crucial role in regulating mood, sleep, appetite, and digestion. Serotonin is primarily found in the brain, gastrointestinal tract, and blood platelets. Imbalances in serotonin levels have been linked to conditions such as depression, anxiety, and migraines. Many antidepressant medications work by increasing serotonin availability in the brain, helping to improve mood and emotional well-being.