Melatonin is a hormone that naturally uccurs in the brain. It is made by the pineal gland. Melatonin circulares through a daily cyde se thah thee is a higher concentration of it at nigth. At night, higher levels of Melatonin is held by the body to induce and melatonina sleep. Therefore, Melatonin supplement taken at bedtime supports the bodys natural process for facilitating sleep. It may also help falling sleep faster and staying sleep all night.