Vitamin D testing...To test or not to test
Below is a thread from one of the yahoo groups i belong. i thought the tread is worth a posting on my blog.
it starts off with someone questioning testing blood for vitamin D levels;
"At the 2009 Wise Traditions Conference Dr. Louisa Williams stated that Vitamin D testing only tells you what is circulating in the blood NOT what is actually getting into the tissues where it makes a difference."