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.* Research shows that sleep plays an important role in strengthening your immune system, improving mental sharpness, maintaining balanced moods and so much more. Natrol Melatonin Advanced Sleep contains Vitamin B6 and Calcium to support the body's natural production of Melatonin.* It's a sleep aid supplement that can help you get better sleep and wake up refreshed.**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.