It's not my only source of information, but I generally check Snake Oil Supplements for these things: http://www.informationisbeautiful.net/visualizations/snake

It's not my only source of information, but I generally check Snake Oil Supplements for these things: http://www.informationisbeautiful.net/visualizations/snake-oil-supplements/ http://www.informationisbeautiful.net/visualizations/snake-o... Vitamin D has a pretty strong position for "general health, all-cause mortality."