Study: Vitamin D Supplements Don't Protect Against Fractures

Scientists from the University of Auckland in Auckland, New Zealand reviewed 23 studies involving 4,082 healthy volunteers with an average age of 59 and report that those who took vitamin D supplements for about two years did not have significantly greater bone density or lower risk of osteoporosis than those who didn't take them.

http://healthland.time.com/2013/10/10/study-vitamin-d-supplements-dont-protect-against-fractures/