vitamin D supplements may not stop bones from deteriorating with age -- but calcium might.
Researchers at Winthrop University Hospital studied more than one hundred women who were either given high doses of Vitamin D, a normal dose of calcium, a combination of both supplements, or no supplements at all.
They found those taking calcium alone experienced a drop in bone turnover -- which is what happens when the body breaks down old bone.
However, Vitamin D did not have any effect on bone turnover.
If the body breaks down bone faster than it can replace it, osteoporosis develops.
Researchers say it appears Vitamin D helps bones absorb calcium, but it does not improve bone health on its own.