Calcium carbonate D3 granules is a better calcium supplement drugs, calcium supplementation effect is still relatively ideal, is made of calcium carbonate as well as vitamin D3 composite agent, can play the role of calcium supplementation at the same time to promote the absorption and utilization of calcium. Calcium supplements include inorganic calcium, common calcium carbonate, calcium chloride, this kind of preparation is higher in calcium content, but more gastrointestinal irritation symptoms, and organic calcium, including calcium gluconate, calcium acetate, calcium lactate, etc., which contains less calcium, but the gastrointestinal reaction is light. The combination of calcium preparations and vitamin D plays the role of calcium supplementation, but also can promote the absorption and utilization of calcium, so this preparation is relatively good. Calcium carbonate D3 granule belongs to this category, which is a better calcium supplement medicine.