Melatonin is a hormone produced by the Pineal gland in the brain. It is best known for regulating sleep cycles but also has essential immune system and calcium metabolism functions. Melatonin is sometimes called the “darkness hormone” because its production is stimulated by darkness and inhibited by light. Levels of Melatonin are typically highest at night and lowest during the day. For this reason, Melatonin is sometimes used as a natural remedy for insomnia and other sleep disorders. Research suggests that it can effectively reset the body’s sleep-wake