"With our hectic everyday schedules, increasing anxiety, and addiction to disruptive phone and computer screens, getting the necessary shuteye can be a challenge. And when we don't, we suffer the consequences, from weight gain to grumpiness. For the many people seeking a simple, natural sleep aid, melatonin has come to the rescue. Melatonin takes a deep dive into the workings of this essential hormone, which regulates sleep and the body's circadian...