“Low vitamin D levels are a symptom of poor health – not the cause, according to a systematic review of previously published scientific studies. The new finding casts further doubt on the role of vitamin D supplements in disease prevention, even as millions of Canadians pop pills of the sunshine drug each day.”
Supplementation is rarely as simple as many would have you believe.
By Adriana Barton in The Globe and Mail, Dec. 08 2013: http://www.theglobeandmail.com/life/health-and-fitness/health/report-questions-effectiveness-of-vitamin-d-supplements/article15804477/