Most people think of melatonin as a natural sleep aid, like chamomile tea in pill form. But melatonin is also a hormone naturally produced by our brain, and as long as it is a hormone, even a very small amount, it can have a huge impact on the human body.

Other studies have also found that the effect of melatonin in helping to fall asleep and regulating the physiological clock may be related to its ability to lower the body's core body temperature (a lower core body temperature before bedtime helps to induce sleepiness and to enter deep sleep more quickly).