A natural way to boost serotonin levels and increase your levels of 5-htp. Serotonin is a neurotransmitter; it helps send messages from one part of the brain to another. Serotonin influences the majority of the cells in the brain, including sleep, appetite, mood and sexual desire. Contains vitamin B3, B6 and zinc to support normal psychological and neurological functions 5-HTP supplements can help relieve depression in a similar way to some antidepressants. It can ease pain, morning stiffness and sleep problems associated with fibromyalgia symptoms.