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Vitamin D Testing

The Mayo Medical Laboratories Difference

Updated: September 2013
Published: February 2009


1. Holick MF, Siris ES, Binkley N, et al: Prevalence of vitamin D inadequacy among postmenopausal North American women receiving osteoporosis therapy. J Clin Endocrinol Metab 2005;90(6):3215-3224

2. Heaney RP: Vitamin D: how much do we need, and how much is too much? Osteoporos Int 2000;11:553-555

3. Chapuy MC, Preziosi P, Maamer M, et al: Prevalence of vitamin D insufficiency in an adult normal population. Osteoporos Int 1997;7:439-443

4. Binkley N, Krueger D, Cowgill CS, et al: Assay variation confounds the diagnosis of hypo-vitaminosis D: a call for standardization. J Clin Endocrinol Metab2004;89(7):3152-3157

5. Singh, R: Are clinical laboratories prepared for accurate testing of 25-hydroxy vitamin D? Clin Chem 2008;54(1):222-223

6. Graham DC, Carter R, Jones J, Berry J: How accurate are assays for 25-hydroxyvitamin D? Data from the International Vitamin D External Quality Assessment Scheme. Clin Chem 2004;50:2195-2197

7. Mayo unpublished quality control data