5-Hydroxytryptamine

5-Hydroxytryptamine, commonly known as serotonin, is a chemical messenger in the body that helps regulate mood, sleep, appetite, and other functions. It is primarily found in the brain, gut, and blood platelets. Serotonin influences feelings of well-being and happiness, and imbalances can be linked to conditions like depression or anxiety. It's produced from the amino acid tryptophan and interacts with specific receptors to carry out its effects. Overall, serotonin plays a crucial role in maintaining emotional stability and various physiological processes.