It seems these days patients know more about the benefits of Vitamin D than their physicians. Doctors are soaking up the information and making sure their patients are taking the proper levels of Vitamin D. Dr. Michael Holick, professor of medicine, physiology and biophysics and director of the Bone Health Care Clinic and the Heliotherapy, Light, and Skin Research Center at Boston University Medical Center, joins host Dr. Lauren Streicher to discuss the proper dosage, risk factors, geographical factors and benefits of Vitamin D.