In the human body 5-HTP (5-hydroxytryptophan) is a precursor to the neurotransmitter serotonin. Serotonin is found in the brain, blood platelets and cells of the gastrointestinal tract. Since serotonin is found in the brain and central nervous system, it has many implications in cognition, mental health and sleep patterns. Supplementation of 5-HTP has shown an ability to increase serotonin levels and consequently support healthy sleep patterns, improve mood and improves outcomes for weight management.