Apart from its effect on sleep, 5-HTP supplements improve mood and help depression, PMS, anxiety and migraines,Alpha Peak  and also help overweight people by acting as an appetite suppressant. Insomnia can be caused by a number of factors, among them anxiety and depression, and serotonin can help to control these conditions. Melatonin secretion appears to be promoted by Vitamin B12 (methylcobalamin) and B12 deficiency is common, especially among the elderly and in vegans, since there is no effective vegetable source. A vitamin B12 supplement might also help sleeplessness by improving the secretion of melatonin once biosynthesized. http://guidemesupplements.com/alpha-peak/