Patient's question:
NoDoctor's answer:
For children with calcium deficiency, it is necessary to supplement both vitamin D and calcium preparations. This is because the primary function of vitamin D is to promote the absorption and storage of calcium and phosphorus, maintaining a certain concentration of calcium and phosphorus in body fluids, allowing them to be normally deposited in bones. The main source of vitamin D in the human body is sunlight exposure. The skin contains a substance called cholesterol, which can be converted into vitamin D3 after being exposed to ultraviolet rays in sunlight.