Vitamin D3 is a form of vitamin D that helps the body absorb calcium and other minerals which are important for healthy bones, immune function, and more. It's also a popular dietary supplement and ...

As a rule, younger people need less vitamin D than older people, regardless of sex. This article explains average vitamin D ...

Vitamin D has two forms: D2 and D3. Vitamin D2 comes from plant-based sources. Vitamin D3 is found in some fish and produced ...