Sleep Once Again is melatonin-based sleep aid sold online. Many have theorized that Melatonin supplementation can be effective as a sleep aid. Melatonin is a hormone that occurs naturally in our bodies. It's level in your body peaks at night-time and is triggered by darkness. Levels remain elevated throughout the night until light decreases it. It is for this reason, melatonin has been studied for use as a sleep aid and insomnia cure. 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 though. It’s unclear whether simple light exposure is more effective than melatonin. Longer term effects are unknown.

Sleep Once Again retails for about $59 per month after a 30 day free trial.

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