What is the Vitamin Most People in the U.S. are Deficient In?http://articles.mercola.com/sites/articles/archive/2004/02/11/vitamin-d-types.aspxBy John Jacob Cannell, MD, executive director of The Vitamin D Council One thing most Americans seem to believe is that sunlight must be avoided for it causes skin cancer, especially malignant melanoma. We decided to give a little quiz about the subjectenCommunityServer 2008.5 SP1 (Build: 31106.3070)