5-HTP or 5-hydroxytryptophan is an amino acid that plays an important role in the production of serotonin, a neurotransmitter. It is also an intermediate in tryptophan metabolism. 5-HTP is often used as an antidepressant and for treatment of various mood disorders. It is often used to induce a feeling of calmness and well-being. 5-HTP plays many roles in the biochemical reactions in the body. Some tryptophan becomes protein, niacin, or serotonin. It also helps reduce the symptoms of fibromyalgia and alleviate severity of pain, morning stiffness, and sleeplessness. It also helps improve focus, concentration and mental clarity. It also helps in weight loss and weight maintenance because it has the ability to suppress appetite and cravings.