Melatonin is a natural hormone produced by the pineal gland in your brain that helps regulate your sleep-wake cycle (circadian rhythm). According to research, 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
- Reducing dopamine levels that keep you awake
When taken as a supplement, melatonin can help adjust your internal clock, particularly useful for jet lag, shift work, or delayed sleep phase syndrome.
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Last Updated: August 24, 2025
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