Melatonin is a natural hormone produced by the pineal gland in the brain that helps regulate our 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 the body that it’s time to sleep
- Regulating body temperature
- Influencing other hormones
- Reducing alertness
While our bodies produce melatonin naturally, it’s also available as a supplement, commonly used to treat sleep disorders and jet lag. Studies show that supplemental melatonin can help reduce the time it takes to fall asleep and improve sleep quality.
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Last Updated: September 20, 2025
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