Vitamin D deficiency is a global pandemic that has serious health consequences for children and adults. Improvement in the world’s vitamin D status could significantly reduce risk of many chronic illnesses including cardiovascular disease, autoimmune diseases, type 2 diabetes and many deadly cancers as well as infectious diseases including upper respiratory tract infections, influenza and tuberculosis.

Michael F Holick, PhD, MD#

Professor of Medicine, Physiology and Biophysics at Boston University School of Medicine