Skip to content

Vitamin D is an essential vitamin that helps your body absorb calcium and phosphorus. Not enough vitamin D -- a vitamin D deficiency -- can cause pain, hormone problems, muscle weakness, and more. Follow the links below to find WebMD's comprehensive coverage about how vitamin D helps your body, how much you need, how to get it, and much more.

Medical Reference

Features

Thumbnail: The Truth About Vitamin D: Drug Interactions

Get answers to common questions on vitamin D.

Read Full Article

Video

Slideshows & Images

Quizzes

Expert Commentary

News Archive

Healthy Recipe Finder

Browse our collection of healthy, delicious recipes, from WebMD and Eating Well magazine.

Top searches: Chicken, Chocolate, Salad, Desserts, Soup

Heart Rate Calculator

Ensure you're exercising hard enough to get a good workout, but not strain your heart.

While you are exercising, you should count between...

-
Beats
PER
Seconds