New Study Casts Doubt on Vitamin D's Disease Prevention Ability

The findings , published in The Lancet Diabetes & Endocrinology journal, could have implications for millions of people who take vitamin D pills and other supplements to ward off illness; Americans spend an estimated $600 million a year on them alone.

http://www.voanews.com/content/reu-new-study-casts-doubt-vitamin-d-disease-prevention/1804892.html