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Vitamin D Facts

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Updated February 25, 2014

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Vitamin D Facts
Picture of Sources of Vitamin D
Photo © Heather L. Brannon, MD

Vitamin D is an important chemical in the body that helps transport calcium from digested food in the stomach to the blood stream, so it can keep bones strong. There are two ways the body gets vitamin D:

  • Exposure to UV radiation
  • Ingesting foods or supplements that contain vitamin D
For years, some people have argued that it's better for your overall health to get vitamin D from exposure to the sun or a tanning bed, instead of wearing sunscreen and limiting sun exposure. You can find out more about this controversy and why it is not healthy to get vitamin D from sun exposure or tanning.

If you don't get your vitamin D from UV rays, though, how do you get it? Is it better to eat food with vitamin D or take supplements? How much vitamin D do you need and can you get too much? You can find the answers to these questions and more here:

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  6. Vitamin D Facts - Facts About Vitamin D Sources

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