Combines the sleep improving benefits with the relaxation promoting benefits.Jamieson In a single dose, Melatonin with Magnesium combines the benefits of magnesium, which helps promote relaxation, with the benefits of melatonin, which improves sleep. Although magnesium supports healthy muscular function and deep nighttime relaxation, 5 mg of melatonin will help you fall asleep and remain asleep. Benefits aids in getting to sleep and staying asleep promotes normal muscular function.. Additional power. Natural sleep aid that is safe and won’t cause addiction. a potent mix of relaxation and sleep.