5-Hydroxytrytophan, 5-HTP, is the immediate precursor to the neuronutrient called serotonin. In effect, 5-HTP converts directly into serotonin in the brain. Serotonin has many beneficial effects in the body and these include: • enhancing sleep quality and sleep duration • controlling appetite • enhances memory and cognitive function • elevates mood and alleviate the symptoms of anxiety and stress • cardiovascular function • regulates other hormones 5-HTP supplements usually contain the extract derived from the seed pods of a Western African medicinal plant called Griffonia simplicifolia. 5-HTP supplements work to replenish serotonin molecules in the brain providing new stores of serotonin whereas certain drugs, namely the SSRI's, work to prevent serotonin breakdown in the brain. 5-Hydroxytrytophan dosage range: 100-300 mg per day. Do not use 5-HTP if you are taking anti-depressants or carbidopa which is prescribed for Parkinson's Disease.