5-HTP, aha zuru oke 5-Hydroxytryptophan, bụ ngwakọta arụpụtara site na amino acid tryptophan sitere n'okike.Ọ bụ ihe mmalite nke serotonin n'ime ahụ ma metabolized n'ime serotonin, si otú ahụ na-emetụta ụbụrụ ụbụrụ neurotransmitter.Otu n'ime isi ọrụ nke 5-HTP bụ ịbawanye ọkwa serotonin.Serotonin bụ neurotransmitter nke na-arụ ọrụ dị mkpa n'ịhazi ọnọdụ, ụra, agụụ, na nghọta mgbu.