5-Hydroxytryptamine, commonly known as serotonin or 5-HT, is a monoamine neurotransmitter and a derivative of the amino acid tryptophan. It plays a crucial role in the central nervous system and various physiological processes, contributing to mood regulation, sleep-wake cycles, appetite control, and gastrointestinal function. Physiological Role of 5-Hydroxytryptamine (5-HT or …