What’s a Vitamin D Deficiency? video
Get a general overview of Vitamin D and Vitamin D Deficiency science and research in this 44 minute video by UCSD School of Medicine and GrassrootsHealth. Vitamin D expert Dr. Robert Heaney, M.D. presents valuable information about why adequate Vitamin D intake is necessary for optimal health, and show the health problems that result from too little Vitamin D and sunlight exposure.