Natural Calm Canada’s Heavenly Sleep Liquid Melatonin is formulated to reduce the time it takes to fall asleep and to reduce the number of wakenings after you have fallen asleep. It is important to note that melatonin deficiency is rare. In fact, the majority of sleep problems are associated with a magnesium deficiency. Magnesium activates the body’s melatonin for a restful sleep, so try magnesium supplementation first with Natural Calm's Magnesium Citrate before trying a melatonin supplement.