How much calcium a baby should take should depend on the specific situation; babies do not lack calcium in their bodies, generally do not need to take calcium supplements, when the lack of calcium, only need to take calcium supplements. Baby in the process of growth and development, the body does not lack of calcium, do not need to supplement calcium, because in the daily life of many foods contain calcium, such as dairy products, soy products and so on. When the baby in the process of growth and development, the body lacks calcium more, you can consider calcium, when the effect of food calcium is not ideal, you can use some drugs for calcium, such as vitamin D, calcium gluconate oral solution, etc., and also to take the baby out of the sun, is conducive to the body of calcium absorption. Parents should not arbitrarily give the baby to take drugs, to be reasonable under the guidance of the doctor for calcium supplementation.