Numerous scientific studies have found that the “bone formation” in the skeleton is greater than the “bone loss” before the age of 35, during which the body has to be provided with sufficient osteogenic raw materials-protein and calcium, etc.-that is to say. During this period, the lack of calcium constitutes the main conflict of bone problems. However, after the age of 45, the “bone formation” in the bones is less than the “bone loss”, and the ability of “bone formation” is relatively weakened, resulting in the loss of bone mass and osteoporosis. The main conflict is not the problem of calcium deficiency. Therefore, in the case of osteoporosis in middle-aged and elderly people, we cannot rely solely on calcium supplementation. Calcium deficiency is related to osteoporosis, but it is only a small part of the cause, and calcium deficiency and osteoporosis cannot be equated. Calcium supplementation alone can only delay the treatment and affect the quality of life. In addition, calcium supplementation alone cannot be fully absorbed by the body. What the elderly really lack is vitamin D, because it is endogenous. As the skin of the elderly becomes thinner, there are fewer sources of vitamin D. Therefore, it is more important to supplement calcium with a certain amount of vitamin D to promote the absorption of calcium. The aim of treating osteoporosis is to reduce the risk of fracture. Calcium supplementation alone is not enough, but anti-osteoporosis drugs are also needed, and drugs that inhibit bone resorption and promote bone formation should be taken. It is recommended that it is best to go to the hospital, where the doctor will use a combination of medication and standardized treatment according to the examination results and the patient’s specific situation. However, medication is a long-term process, which requires long-term adherence, together with more moderate exercise such as aerobic exercise (walking, tai chi, etc.) in order to fight a good bone defense.