Dietary Supplement Magnesium is an essential mineral, important for many normal body functions, including maintaining proper heart rhythm, neuromuscular transmission, food metabolism and growth.* Natural color. Preservative-free. Corn-free. Milk-free.Wheat-free. Yeast-free. Sugar-free. Gluten-free. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.