There is no such thing as the best calcium supplement for children, children can choose calcium carbonate, calcium gluconate, calcium lactate and so on, even if the same kind of calcium tablets, the effect also has individual differences. 1. Calcium carbonate: mainly divided into two types, including heavy calcium carbonate and light calcium carbonate, clinically known as heavy calcium and light calcium, can promote bone development and prevent osteoporosis. 2. Calcium Gluconate: Calcium Gluconate is an organic calcium salt, which can be made into Calcium Gluconate Oral Solution, Calcium Gluconate Tablets and Calcium Gluconate Containers. These are calcium supplements that can effectively prevent osteoporosis and promote bone development. 3. Calcium Lactate: Calcium Lactate Granules, for example, is a calcium supplement that is designed to promote the calcification of bones and teeth, and to prevent the development of bones and teeth due to calcium deficiency. If your child is deficient in calcium, it is recommended to go to the hospital for a checkup first, and the doctor will choose the most suitable calcium supplement according to the calcium deficiency and physical development.