Melatonin is a hormone that is naturally found in the body and in many occasions is used as a medicine that is usually done synthetically in a laboratory to treat sleep disorders.
Melatonin may help certain correct sleep disorders in blind people. It is also effective in correcting sleep problems in children with autism and mental retardation. There is scientific evidence that melatonin håndkøb can improve alertness in people with jet lag. But it doesn’t seem to be as useful for other jet lag symptoms as daytime sleepiness.