Melatonin is a hormone your body produces in order to reduce stress and facilitate healthy sleep cycles. Supplementing with additional melatonin simply helps your body do what it wants to do already. Studies show that melatonin may improve sleep quality, quantity, and consistency. It also has more general health-promoting qualities. [3] Each of our Knockout Gummies contains 3 milligrams of melatonin. That’s right in line with the dose studies find effective.