Many parents often ask: “My child is taking calcium supplements every day, why is he still deficient in calcium?” In fact, the common folk term for calcium deficiency is medically known as “vitamin D deficiency rickets”, which is caused by a lack of vitamin D in the body. The first thing to do is to routinely supplement vitamin D. Then, depending on the situation, see if you want to supplement calcium in moderation. If you don’t have enough vitamin D, you can’t eat more calcium. There are many foods that contain calcium, so formula-fed children can meet their calcium nutritional needs as long as they have a certain amount of milk intake and a balanced diet, so there is no need to supplement calcium. If the diet is balanced, children over the age of 2 years old can prevent rickets if they get enough vitamin D in their diet and have enough sun exposure, and they do not need to take calcium supplements. The very few children who are deficient in calcium are mainly caused by partial eating, or poor nutrition. The following are some of the misconceptions about calcium supplementation, have you been hit? And remember: calcium supplementation is not a way to grow taller. Excessive calcium supplementation, repeated calcium supplementation, and large amounts of vitamin D will not only affect children’s appetite, but also make them prone to anorexia, constipation and flatulence, and may even develop stones.