"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When you decide to spend money on a vitamin or supplement, you want to be sure it delivers. Which is why ...

There are two types of vitamin D supplements available for over-the-counter purchase (vitamin D2 and vitamin D3). Vitamin D3 is the type that most experts believe should be utilized in clinical ...

Note: The U.S. Food and Drug Administration (FDA) does not approve supplements for safety or effectiveness. Talk to a healthcare professional about whether a supplement is the right fit for your ...

Scientists discovered that vitamin D2 supplements can lower levels of vitamin D3, the form the body uses most effectively. Unlike D2, vitamin D3 enhances the immune system’s first line of defense ...

Vitamin D2 and D3 are the two main forms of vitamin D. Vitamin D2 is present in plants and yeast, while D3 comes from animal sources. Vitamin D is essential for a range of bodily functions, such as ...

Taking vitamin D2 might lower the body's levels of the more efficient form of vitamin D, vitamin D3, according to new research from the University of Surrey, John Innes Centre and Quadram Institute ...

Vitamin D supplements come in two main types: D2 and D3, and a new meta-analysis finds that taking D2 often lowers blood levels of D3. The researchers pooled data from randomized controlled trials and ...

Vitamin D is known to be essential to many aspects of human health — but a new study suggests that taking a certain form of it can have a negative effect. The more potent and longer-lasting form, ...

Taking vitamin D2 might lower the body's levels of the more efficient form of vitamin D, vitamin D3, according to new research from the University of Surrey, John Innes Centre and Quadram Institute ...

When you decide to spend money on a vitamin or supplement, you want to be sure it delivers. Which is why it can be a bit disheartening to walk down the vitamin aisle at the drugstore looking for a ...