Essence Nutrition Melatonin is a dietary supplement in the form of tablets containing melatonin. It is a hormone that occurs naturally in the body, produced, among others, through the pineal gland. Light inhibits the natural synthesis of this compound. Melatonin in a dose of 1mg helps to reduce the time needed to fall asleep. This helps to stabilize the circadian rhythm. Circadian rhythm is a natural mechanism of human and animal functioning. Most biological processes are carried out according to a specific pattern, depending on the time of day. This results in the fact that some hormones are secreted in the morning, others in the evening, and their concentration changes throughout the day. Melatonin should be used by people who want to accelerate the process of falling asleep and stabilize the circadian rhythm. Melatonin supplementation should also be used by people who change their time zone (jet-lag).