5-Hydroxytryptophan (5-HTP) is a natural amino acid derivative. It is mainly extracted from the seeds of Griffonia simplicifolia, native to West Africa. In terms of physiological functions, 5-HTP serves as a precursor to serotonin (5-hydroxytryptamine) in the human body. Serotonin plays a crucial role in regulating mood, sleep, and other functions. By supplementing with 5-HTP, it can help increase the level of serotonin in the brain, thus improving mood, alleviating anxiety and depression, and also contributing to better sleep quality. In the field of applications, it is quite common in the health supplement industry. It is often made into capsules and other forms to assist people with mood disorders or sleep problems. However, when using it, it is necessary to follow relevant recommendations and regulations to avoid potential side effects.