Vitamin D Only Effective at High Doses – 7/6/2012
July 6, 2012 -- A new analysis of nearly a dozen studies testing vitamin D in older individuals has concluded that it takes a daily dose of at least 800 international units (IU) to consistently prevent broken bones.
A dose that high was found to reduce the risk of hip fracture by 30 percent and other breaks by 14 percent. Lower doses didn't have any effect.
Read the full story:Reuters