A new meta-analysis is challenging long-standing assumptions about vitamin D supplements. New research from researchers at ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The supplement aisle can be chaotic — an endless wall of brands and formulations to supposedly support ...

"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 ...

Vitamin D (calciferol) is a fat-soluble vitamin that helps support strong bones, maintain muscle function, strengthen the immune system, and promote mental well-being. Vitamin D has two forms: vitamin ...

Vitamin D has become one of the most popular supplements in America.

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 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 ...

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 ...

When is the best time to take vitamin D? Experts explain how to maximize the effects if you're supplementing with the vitamin ...

Plus, how to get what you need.