2023年8月10日 · Vitamin D is a nutrient your body needs for building and maintaining healthy bones. That's because your body can only absorb calcium, the primary component of bone, when vitamin D is present. Vitamin D also regulates many other cellular functions in your body.

Vitamin D deficiency means that you don’t have enough vitamin D in your body. It's common and primarily causes issues with your bones and muscles.

Vitamin D is an essential vitamin that helps regulate calcium and phosphorus in the body. It also plays a role in maintaining proper bone structure. There are different forms of vitamin...

2013年5月20日 · Vitamin D is a fat-soluble vitamin in a family of compounds that includes vitamins D1, D2, and D3. Your body produces vitamin D naturally when it’s directly exposed to …

Vitamin D is a group of structurally related, fat-soluble compounds responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, along with numerous other biological functions. [1] [2] In humans, the most important compounds within this group are vitamin D 3 (cholecalciferol) and vitamin D 2 (ergocalciferol). [2] [3]

2025年1月14日 · As a rule, younger people need less vitamin D than older people, regardless of sex. This article explains average vitamin D levels for infants, children, and adults.

The most common test for vitamin D deficiency is the 25-hydroxy vitamin D test because 25-hydroxy, or calcidiol, has higher concentrations and stays in your blood longer, which makes it easier to detect.