Calcium belongs to children in the process of growth is not missing elements, if children lack of calcium, it will cause very slow growth, more serious consequences is to cause some other diseases. The net content of calcium in calcium supplements, such as natural calcium lactate 24% to 28%, calcium lactate 13%, calcium carbonate 40%. Calcium supplementation alone is not highly absorbed and utilized by the body, and nutrients that promote calcium absorption and utilization, such as vitamin D supplementation, need to be added. Currently, the most suitable calcium sources for pediatric patients are natural dairy calcium (extracted from milk) and calcium carbonate. For calcium supplements for children, choose calcium supplements specifically for children and do not take calcium tablets suitable for adults. One year old baby in in the period of growth, growth is fast, so it is recommended that one year old baby calcium can be supplemented by a combination of food and calcium supplements to calcium. The calcium supplement choice is suitable to choose pediatric calcium carbonate D3 granules, calcium gluconate oral solution, pediatric calcium carbonate D3 chewable tablets, calcium vitamin D soft capsule, etc. Food calcium supplement, one year old baby can drink more milk, eat soy products, consume shrimp, fish, bone broth and other foods, in addition to the baby can be given some cod liver oil again, which is also helpful for calcium absorption.