This is one you’ve got to listen to! Here’s a very informative radio interview with vitamin D expert Michael Holick MD, PhD. He hits all of the main topics including; history, doses, toxicity, disease prevention, etc.

A couple of the things I found interesting about this interview was his mentioning of there being only 2 dozen cases worldwide of vitamin D intoxication in the past 30 years!

Also interesting to me was his mentioning that he’s noticed vitamin D2 to be about half as effective as the vitamin D3 (his preference and the type we use at our clinic). This is what we’ve seen as well for a couple of patients who had been given D2 by different doctors, but since it was only a couple of patients it was not entire clear if it was the D2 or some other reason.