The lack of calcium in the human body can cause the occurrence of osteoporosis, so we should pay attention to calcium supplementation. The first thing to do is to start with diet, pay attention to a high-calcium diet, which is a fundamental measure to prevent calcium deficiency, but also an economic and safe method of calcium supplementation, as follows: First, you can eat foods with high calcium content, such as shrimp skin, seaweed, nori, etc. Second, consume the right amount of protein, preferably high-quality protein, such as eggs, lean meat, fish, shrimp and soy products, etc. Third, to eat more vitamin C-rich foods, such as fresh vegetables and fruits, which can promote the absorption of calcium. Fourth, we should pay attention to lower calcium and phosphorus diet, when the blood phosphorus increases, blood calcium will also occur to reduce, pay attention to low salt, low sugar diet, and develop a good lifestyle and habits. No matter how much calcium is consumed, it cannot be absorbed by the small intestine without vitamin D. Therefore, it is very important to maintain a reasonable amount of sunlight. Six, if necessary, you can choose calcium tablets for supplementation, according to their own lack of calcium, choose the appropriate drugs. In addition, it is not advisable to drink a lot of water after calcium supplementation to avoid diluting the calcium.