While we know that vitamin D is crucial for our immune system, a new study suggests that its powers extend far further.

Plus, who might need it and how to get enough.

What is vitamin D3? Your body creates this vitamin naturally when exposed to sunlight. In the winter, however, we tend to stay inside more, making it harder to get the proper amount of D3. There are a ...

Plus, how to get what you need.

Vitamin D3, a form of vitamin D, promotes strong bones, good immune health, and mental well-being. You can get vitamin D3 from fortified foods, eggs, and fatty fish — or by spending time in the sun.

Editor's Note: This is an excerpt from WBUR's weekly health newsletter, CommonHealth. If you like what you read and want it in your inbox, sign up here. I have a lot of questions about vitamin D. Our ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Vitamin D supports your immune system, muscle function and bone health, but now there’s another reason to ...

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