Melatonin
The body produces the hormone melatonin naturally. Both the sleep-wake cycle and the body's natural circadian rhythm are influenced by it. The night is when melatonin levels are highest, and the day is when they are lowest. The body produces more melatonin when it is dark, which makes us feel sleepy. Light exposure increases alertness and reduces melatonin production. People who struggle to fall or stay asleep can benefit from taking melatonin supplements.
