Other ingredients: Distilled water. 20% ethanol.
5-HTP is the active form of tryptophan, an essential amino acid. It functions as the precursor to serotonin, and has a definite antidepressant effect. Like serotonin, 5-HTP is beneficial for control of sleep disorders. It also influences the large intestine (where most of the serotonin in the body is found), neutralizing bloating and constipation.