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5-HTP
5-HTP 5-HTP, or 5-hydroxytryptophan, is a biological substance made from tryptophan and is the immediate precursor the body uses to produce serotonin.
5-HTP, or 5-hydroxytryptophan, is a biological substance made from tryptophan and is the immediate precursor the body uses to produce serotonin. It has also been used as an antiepileptic and antidepressant.