Should I take Vitamin D2 or Vitamin D3?

D2 or D3?In recent years, we have learned that getting adequate vitamin D is crucial to many aspects of our health, and that for many people reasonable sun exposure is not enough. There are two forms of supplemental vitamin D, D2 and D3. In the past, D2 was the only vegan form of the vitamin available, but vegan D3 is now on the market. Which one should you take? Find out in this article.