What is melatonin?
The hormone melatonin is produced naturally by the body at nighttime, in response to darkness. It's nicknamed the sleep hormone due to its role in our Circadian rhythm, getting us ready to go to sleep in the evening. It's secreted by the pineal gland, located at the back of the brain, and then released into the bloodstream. In the morning, another hormone called cortisol takes over and transitions us into wakefulness.
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