How Much Vitamin D Should I Be Taking?

What would the Neanderthals say? Some of us say none, or 600-800 IU, or 1000-2000 IU. It's a messy answer.

You would think a simple question like how much vitamin D should I be taking? would have a simple answer. But like any medical question, finding the right answer devolves quickly into a search engine nightmare of conflicting numbers, studies, unique patient considerations, and expert opinions. Answering even the most simple question becomes paralyzing…