http://abcnews.go.com/blogs/health/2013 ... e-warning/
Also posted here: http://www.thisisms.com/forum/chronic-c ... ml#p204805In a new study by Kaiser Permanente, researchers performed an independent analysis of several over-the-counter vitamin D supplements, and the results were startling: vitamin content varied from as low as 9 percent to as high as 146 percent of the amount of vitamin D listed on the bottle.