Under normal circumstances, the melatonin hormone is released by the pineal gland in the brain shortly after sunset and for the duration of the night. It links your biological clock and the timing of your sleep to the natural cycle of the day. Supplemental melatonin is often quite effective at that job, and since it seems more natural than a prescription or drugstore OTC option, it might be tempting to turn to it nightly. But there are some health impacts you should keep in mind if you do. Head to the link in our bio to learn what exactly happens to your body when you take melatonin every night.