Melatonin is a hormone produced by the pineal gland in the brain that affects the regulation of circadian rhythms in organisms. Hormone production increases in the dark and decreases in light. Melatonin is a popular dietary supplement due to its effect on sleep. Research suggests that its effects can help reduce the time it takes to fall asleep. Improve sleep quality, and reduce tiredness during the day. The pineal gland hormone also has many other functions in the body. It regulates the work of the immune system, as well as the impact on the aging process. In laboratory studies, melatonin has been shown to have antioxidant properties that help protect cells from oxidative damage. It is also used as a growth hormone booster.

Dosage: from 0.5 mg to 5 mg per day.