With a whopping 10 mg in each tablet, Olympian Labs Melatonin is one of the most potent melatonin supplements available. Melatonin, a hormone secreted throughout the night by the pineal gland, helps support the body's ability to get a restful and restorative night's sleep. This product is also time-released, which means it is absorbed slowly, allowing you to get sleep support all through the night.