Many elderly people, especially women after menopause, suffer from osteoporosis due to endocrine and exercise reduction, as well as other medical disorders, which reduce the bone mineral content of the body causing osteoporosis. However, there are differences among individuals and cannot be generalized. We need to go to a regular hospital for a “dual-energy X-ray bone density” test to see how far our osteoporosis level is from the average normal value and how much risk of fracture we have. It is important to know the current condition of your body in order to develop a scientific “calcium supplement” program. Many people believe that calcium supplements can cause stones. In fact, a daily calcium supplement of 850 mg or less will not cause kidney stones in the elderly. To prevent kidney stones, avoid eating foods that contain too much oxalic acid, such as spinach and bamboo shoots, or blanch such foods in hot water to dissolve and remove oxalic acid before consumption. At the same time, drinking more water in general can also effectively reduce the occurrence of kidney stones. Can osteoporosis be prevented by calcium supplementation alone? The truth is that calcium supplementation alone is not effective in treating osteoporosis, and prevention of osteoporosis requires a comprehensive and multi-channel treatment. Our daily diet contains about 400mg of ionized calcium per day, and older people lose more calcium than younger people, so they need to take 800-1000mg of calcium supplements per day, depending on the results of their “dual energy X-ray bone density” test. Calcium supplements play a role in the treatment of osteoporosis by providing raw materials, and the calcium supplementation needs to be coordinated with various aspects in order to be effective. Vitamin D is an important substance that promotes the absorption of calcium in the body. In addition to medications, many foods such as salmon, milk, eggs, mushrooms and shrimp are also rich in vitamin D. The right amount of sunlight exposure is also a way to promote vitamin D synthesis. Elderly people who stay indoors for long periods of time and have difficulty moving around generally have a lower synthesis capacity and need additional vitamin D supplements to facilitate calcium absorption. However, for elderly people with osteoporosis, even if vitamin D is increased, the effect on the improvement of osteoporosis will be minimal. This is why such elderly people must be treated by their doctors to solve the problem. In our clinical experience, most patients with low back pain can significantly improve their symptoms with the application of calcitonin when they are given conventional vitamin D plus calcium supplementation; treatment requires the simultaneous application of diphosphonates. Nowadays, many businesses promote so-called molecular calcium, atomic calcium, efficient calcium, active calcium, genetic calcium and other nutritional products under the guise of “calcium supplementation” for the elderly. In fact, these are only commercial terms, in nutrition these “high-tech words” do not exist, can not explain any problem. The state explicitly states that all food products are not allowed to advertise their therapeutic effects, and only calcium supplements that are “medically approved” can be safely purchased and used.