5-HTP, magaca buuxa 5-Hydroxytryptophan, waa ka samaysan ka samaysan amino acid tryptophan si dabiici ah u soo baxay. Waa horudhaca serotonin ee jirka waxaana lagu dheefshiidaa serotonin, taas oo saameynaysa nidaamka neurotransmitter ee maskaxda. Mid ka mid ah hawlaha ugu muhiimsan ee 5-HTP waa in la kordhiyo heerarka serotonin. Serotonin waa neurotransmitter oo door muhiim ah ka ciyaara nidaaminta niyadda, hurdada, rabitaanka cuntada, iyo dareenka xanuunka.