Calcium acetate granules are organic calcium preparations, which are relatively fast absorbing and less irritating to the gastrointestinal tract, making them a good calcium supplement. Commonly used calcium preparations include organic calcium, inorganic calcium and the combination of calcium and vitamin D. Inorganic calcium commonly includes calcium chloride, calcium carbonate, calcium content is relatively high, after taking the rapid formation of calcium ions, absorption and utilization is relatively high, gastrointestinal tract reaction is relatively heavy. Organic calcium, such as calcium gluconate and calcium acetate, has a low calcium content compared to inorganic calcium and has a relatively mild gastrointestinal reaction. Calcium preparations, as well as vitamin D combination, can promote good absorption and utilization of calcium, and are effective for calcium deposition and absorption, etc. Different drugs should be used for calcium supplementation according to different situations.