How to Tell if You’re Vitamin D Deficient

This is the tenth part of a 15 part Vitamin D series. Dr. John J. Cannell, Executive Director of the Vitamin D Council. Here he explains how to tell if youre vitamin d deficient (25-hydroxyvitamin D blood test) and what are some possible symptoms of deficiency.

Order Dr. Cannell’s Advanced D here:
Purity Products Vitamin D


Leave a Reply