Very recently the Institute of Medicine of the prestigious U.S. National Academy of Science published a review of the scientific literature and noted that vitamin D may be linked to heart disease, immune function, cancer prevention and diabetes.
Over the years, his op.ed. articles have appeared in such publications as: The Wall Street Journal, USA Today, The New Republic, The Washington Post, The New York Times, The Christian Science Monitor, The Los Angeles Times, NationalReview, Newsday, American Legion Magazine, and Commentary.