The purpose of the study was to find out if Vitamin D supplements would have an effect on osteoarthritis. 146 people with Osteoarthritis of the knee were studied for 2 years by a team led by Dr. Timothy McAlindon, an associate professor of medicine in the rheumatology division at Tufts New England Medical Center.
They found that Vitamin D supplements did not help the participants in the study and the findings were presented at the American College of Rheumatology Annual Scientific Meeting in Atlanta. Web MD reports that the study should be considered preliminary and has not been reviewed by outside experts before it is published in a medical journal. I could not find any information about where the funding for the study came from.
During the study, participants were only brought up to above 30 ng/ml so it appears that the study was based on below optimal levels. Web MD, however, reports "There's no consensus on what level is optimal, but 15 to 80 nanograms per milliliter of blood is generally considered normal," according to McAlindon.
I was diagnosed with severe Vitamin D Deficiency with a level of 18 and I know over 30 people diagnosed with Vitamin D Deficiency at levels of 35 and below. I wonder what the findings would have been if the participants were brought to a higher level?
For anyone interested in learning about Vitamin D Deficiency, Michael Holick, John Cannell, Cedric Garland, The Vitamin D Council and Grassroots Health are excellent resources.