Melatonin is a natural hormone produced by the pineal gland in the brain that helps regulate your sleep-wake cycle (circadian rhythm). Research shows that melatonin levels naturally rise in the evening and fall in the morning.
The hormone works by:
- Signaling to your body that it’s time to sleep
- Regulating body temperature
- Influencing other hormones that affect sleep
As a supplement, synthetic melatonin mimics the effects of your body’s natural melatonin. Studies indicate it can be particularly helpful for people with disrupted sleep schedules, jet lag, or certain sleep disorders.
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Last Updated: August 18, 2025
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