Summary:
- Melatonin is a hormone produced by the pineal gland in the brain that helps regulate the body's sleep-wake cycle.
- Melatonin levels naturally increase in the evening as it gets dark, signaling to the body that it's time to sleep, and decrease in the morning as it gets light, signaling that it's time to wake up.
- Melatonin supplements can be used to help treat sleep disorders, jet lag, and other conditions related to disruptions in the body's natural sleep-wake cycle.