This vid is for my friend Mat and everyone else who doesn’t want to supplement with vitamin d in the winter time and rather get from UV light, which is most optimal source of vitamin d. Now I been using…

with Dr. Michael F. Holick, MD, Ph.D. Professor, Boston University This is an extended version of Dr. Holick’s previous webinar on “What does the sun do for me?” Topic: Vitamin D: Sun or Supplement By: Dr. Michael Holick Event date:…