Many have theorized that Melatonin can be used as a sleep aid. Melatonin is a hormone that occurs naturally in people. It's level in your body peaks at night-time. It is triggered by darkness and levels remain elevated throughout the night until light eventually decreases it. It is for this reason, melatonin has been studied for use as a sleep aid. The problem is, most studies have shown that it is no more effective than a placebo. Some positive results have been shown in treating jet lag. It’s unclear whether simple light exposure is more effective than melatonin. Long term effects are not known.

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