Melatonin is secreted naturally by a gland in our brain and regulates the circadian rhythm. Often called the “body clock,” this special cycle informs us when to sleep and eat. Research shows that melatonin increases your metabolism improving your ability to lose weight. Melatonin fights fat turning it into energy rather than storing it. Melatonin alone will not help in massive weight loss so it is recommended to include this supplement into your weight loss strategy together with a healthy diet and physical activity.