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, signaling to our body when it’s time to sleep and wake up.
The hormone works by:
- Binding to receptors in the brain that reduce nerve activity
- Decreasing dopamine levels that help keep us awake
- Regulating body temperature for optimal sleep
As a supplement, synthetic melatonin mimics this natural process, which is why it’s commonly used to treat sleep disorders and jet lag.
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Last Updated: August 20, 2025
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