1: Milk, cheese, eggs, bean products, kelp, laver, shrimp skin, sesame, hawthorn, marine fish, vegetables and so on have high calcium content. Especially milk, drinking 500 grams of milk every day can supply 600 milligrams of calcium; Plus about 300 mg of calcium supplied by other foods in the diet, it can completely meet the human body's demand for calcium. At the same time, we should pay attention to strengthening outdoor sports and sunbathing regularly, which can promote the synthesis of vitamin D in the human body and help the human body absorb calcium.

2. Generally speaking, oral calcium supplements suggest that children choose liquid preparations, which is beneficial to children's absorption. At the same time, it is suggested to supplement VD (such as Yikexin) to increase children's chances of sunbathing, because ultraviolet rays in sunlight can increase the synthesis of VD by children's skin and promote the absorption of calcium in the intestine in food and medicine.

3. There are two ways to supplement calcium, calcium agent and dietary calcium supplement. The most commonly used and traditional calcium supplements are milk and dairy products, which are not only rich in calcium, but also easy to absorb. Milk and dairy products are also rich in minerals and vitamins, among which vitamin D can promote the absorption and utilization of calcium. Yogurt is also a very good calcium supplement food, which can not only supplement calcium, but also regulate intestinal function through beneficial bacteria, and is suitable for all kinds of people. For people who don't like or tolerate milk, they can eat more alternative foods, such as oysters, laver, Chinese cabbage, cauliflower, kohlrabi, radish, Chinese cabbage, Chinese cabbage and so on. However, calcium supplementation should also be appropriate, and excessive calcium supplementation is harmful. Therefore, it is safe to supplement calcium on the basis of monitoring bone calcium, and food supplement should be the main method.