#502 Do We Need More Vitamin D?

Most people know that Vitamin D, the sunshine vitamin, is crucial for calcium metabolism. But it is also involved in many health functions that seem to have nothing to do with strong bones. Without adequate vitamin D, people may be more susceptible to cancer, high blood pressure, diabetes and depression. But how many of us are getting enough? Guest: Michael Holick, PhD, MD, Professor of Medicine, Physiology and Biophysics, Boston University Medical Center