Letters Section Editor: Jody W. Zylke, MD, Senior Editor.
Author Affiliations: Menzies Research Institute Tasmania, University of Tasmania, Hobart, Australia (firstname.lastname@example.org).
To the Editor: Dr McAlindon and colleagues1 reported that vitamin D supplementation for 2 years at a dose sufficient to elevate 25-hydroxyvitamin D plasma levels to higher than 36 ng/mL did not reduce knee pain or cartilage volume loss in patients with symptomatic knee osteoarthritis. However, this study has several potential limitations that might make the conclusions problematic.
Ding C, Cicuttini F, Jones G. Vitamin D Supplementation in Patients With Osteoarthritis. JAMA. 2013;309(15):1583–1584. doi:10.1001/jama.2013.3775
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