Learn about the best time of day and way to take vitamin D, including how the timing may affect sleep, and if you should consider supplementing with this nutrient.

Maintaining normal vitamin D levels can help support healthy sleep patterns. However, the time of day you take vitamin D may influence its benefits.

(Peter Dazeley/The Image Bank/Getty Images) The "sunshine vitamin" may come with a dark side. Just as a lack of vitamin D can ...

You might be doing everything right—taking a vitamin D supplement, drinking milk, eating salmon and soaking up midday rays. On the surface, it seems like you’ve got your vitamin D bases covered. Yet ...

Vitamin D2 supplements may lower blood levels of vitamin D3, which the body uses more effectively. Vitamin D2 comes from plants, while D3 is usually animal-based, making D3 harder to access for people ...

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 ...

"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 ...

Some people may still need to supplement.

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 ...

Plus, the best ways to supplement your body if you find out you're deficient.

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 ...