Three-year-old children can eat calcium-containing foods, such as milk, eggs, soy products can play the effect of calcium, if eat calcium supplement food still exists in the case of calcium deficiency, you need to follow the doctor’s advice to take calcium supplements. Calcium-containing foods are many, such as milk, yogurt and other dairy products, rich in calcium, can be appropriate for three-year-old children to supplement, such as soybeans, lentils, soy milk, tofu and other beans and their products, also rich in calcium. Three-year-old children want to supplement calcium, generally first consider dietary supplements, if dietary supplements do not play a significant role in calcium supplementation, you can take calcium supplements (calcium gluconate, etc.), can get a better effect of calcium supplementation, it is important to note that in the supplemental calcium at the same time, you can take the children to sunlight, which will help calcium absorption. If the light is not enough, at the same time can be combined with vitamin D to take, the effect is better, more conducive to the absorption of calcium.