One year old babies can supplement calcium through dairy products and complementary foods, calcium supplements, vitamin D and so on. 1. dairy products and complementary foods: one year old babies usually drink breast milk or formula every day, about 500 ml or so, dairy products are rich in calcium. 6 months after the baby to add complementary foods, complementary food in the soybean products, lean meat, eggs are rich in calcium. 2. Calcium: if dairy products and complementary foods in the calcium can not meet the body’s needs, in the case of calcium deficiency need to supplement calcium supplements, such as calcium carbonate, etc., can alleviate the symptoms of calcium deficiency in babies, taking time is generally between meals or before going to bed, the effect of calcium supplementation is relatively good. 3. Vitamin D: one year old baby calcium supplementation at the same time to properly supplement vitamin D, vitamin D can promote the absorption of calcium, the use of vitamin D, but also to let the baby outdoor activities in the sun properly, which helps the synthesis of vitamin D, to promote calcium and phosphorus metabolism. One year old babies with calcium deficiency need to use medication under the guidance of a doctor.