tired woman looks at clock

Melatonin regulates your biological clock.

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Melatonin is the timekeeper of the body. It's a hormone that regulates your biological clock. As you get older you make less melatonin, which experts believe is probably why older folks have more trouble sleeping. Research is showing that taking a melatonin supplement can help you sleep. Ask your doctor about taking 1 to 3 mg of melatonin 11/2 to 2 hours before bedtime.