Some examples of safe, all-natural sleep aides are melatonin and chamomile, according to WebMD. These may be good options for people who don't want to take prescription drugs but suffer from insomnia or have trouble staying asleep.
Melatonin is a hormone that is naturally produced in the human body by the pineal gland, explains WebMD. Scientists believe it can work as a sleep aide because of the role that it plays in regulating circadian rhythms, which make up the body's natural sleep cycle. Chamomile is an herbal that has been used for thousands of years as a sleep aide. It comes in the form of tea, extract or ointment.