Weider's Melatonin Up provides 1mg of high quality melatonin. Melatonin is an effective aid in regulating sleep disorders, reducing the time it takes to fall asleep, regulating the sleep cycle, and alleviating jet-lag. In addition to reducing the time it takes us to fall asleep, taking melatonin also helps improve the quality of our sleep, reducing the number of times we wake up during the night and helping to make our sleep more restful. 100% sugar free.