Melatonin is best known for healthy sleep and circadian rhythms, but it supports much more. As one of the most researched nutrients in the world, melatonin is the subject of over 27,000 published studies and growing! Start your day rested. Melatonin is already produced by your body, but over time levels can decrease. This supplement supports the balance in your favor. With sustained release, you can count on a consistent level of melatonin throughout the night, every night.