Calcium supplements generally refer to pharmaceutical preparations for calcium supplementation, which are essential drugs for the prevention and treatment of osteoporosis, and can usually be supplemented orally as needed. Commonly used calcium supplements include calcium carbonate, calcium lactate, calcium gluconate, Gatinex, active calcium, and so on. In the process of applying calcium supplements, it is necessary to pay attention to the regular review of blood calcium and adjust the dosage of medication according to the amount of blood calcium to avoid causing hypocalcemia. In the process of calcium supplementation, if it can be used in combination with vitamin D, the efficacy of calcium supplementation can be strengthened. Avoid foods that interfere with calcium absorption, such as red meat, soft drinks, excessive coffee and alcohol.