Natural Calm Ionic Magnesium Citrate Powder - Organic Raspberry-Lemon Flavour - Magnesium influences many bodily processes, including digestion, energy production, muscle function, bone formation, creation of new cells, activation of B vitamins and relaxation of muscles, as well as assisting in the functions of the heart, kidneys, adrenals, brain and nervous system. Lack of Magnesium in the diet can effect any or all of these functions. Magnesium deficiency can be caused by a number of things, including-but not limited to-lack of adequate dietary magnesium, emotional stress, some drugs (diuretics, antibiotics, birth control pills, insulin, cortisone), heavy exercise, diabetes, gastrointestinal disorders and excessive calcium in the diet.