From aging and everyday stress to late night screen time, there are many factors that can disrupt or minimize our ability to produce melatonin, the key to the body's "sleep-wake" cycle.* Natrol Melatonin Advanced Sleep contains Vitamin B6 and Calcium to support the body's natural production of melatonin.* Its 2-layer tablets help you fall asleep faster and stay asleep throughout the night.**These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any diseases.