MELATONIN THE NATURAL SLEEP HORMONE THAT GUARD YOUR SLEEP RHYTMAfter dark, there melatonin is released into your body. The light, the production stops. Overall, melatonin regulates your circadian rhythm.
Melatonin causes the body temperature drops, so the body knows it is night and go rest. When the substance is present in the blood, we become drowsy and we fall asleep .