5-Hydroxytryptophan is an important building block for the human body to form serotonin. 5-HTP works in the brain and central nervous system by increasing the production of the chemical serotonin. Serotonin can affect sleep, appetite, temperature, sexual behavior, and pain sensation. Since 5-HTP increases the synthesis of serotonin, it is used for several diseases where serotonin is believed to play an important role including depression, insomnia, obesity, and many other conditions. *One bottle contains 60 VCaps, each supplying 100 mg of 5-HTP.