Medically reviewed by Elizabeth Barnes, RDN Melatonin is a hormone naturally produced in the body in response to darkness. It helps you sleep by controlling circadian rhythms. You can also take it as ...

Because of this, ingredients used in melatonin supplements can vary widely and dosing recommendations can be inconsistent. Martin adds that "data on safety is also limited," and that it's unwise ...

But taking melatonin might help ward off this risk, a new study suggests. Advertisement Folks on the night shift taking melatonin had a substantial increase in their urine of a biochemical that ...