Melatonin is naturally produced in the body to guide our “sleep-wake” cycle. When the sun sets, darkness signals the brain to produce melatonin, telling our body it’s time to sleep. Melatonin levels stay elevated to help keep us asleep. When the sun comes up, the light signals the brain to stop making melatonin. Changes in routine, season time changes, and screen-time before bed are some of the many things that can interrupt melatonin production and throw us off cycle.