L-5-Hydroxytryptophan (5-HTP) is an amino acid extracted from the Griffonia Bean. It is found in high concentrations in the brain and acts as a building block for the brain to make serotonin. Under the proper stimulus the brain will turn 5-HTP into serotonin and/or melatonin. Because of this mechanism, 5-HTP is a very gentle yet powerful product to support mood. 5-HTP may work synergistically with certain nutritional supplements to support mood. This nutritive amino acid may also support a healthy sleep cycle.