Natrol melatonin drug-free nighttime sleep aid dietary supplement delivers 3 mg. Per tablet of melatonin and 10 mg. Per tablet of vitamin d6 to promote normal sleep patterns. Our bodies produce melatonin naturally to manage our sleep cycles, but aging, stress, poor diet, lack of exercise and other causes can disrupt its production. The melatonin in this 240 count bottle helps you get to sleep and to sleep more soundly, without the use of drugs.