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Vitamin D and Health in the 21st Century: an Update |
1 From the Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa Hospital (AC and SOD), and the Evidence-based Practice Center (LP), University of Ottawa, Ottawa, Ontario, Canada, and the School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec, Canada (HAW). For Stephanie Atkinson (Nutrition and Metabolism Research Laboratory, Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada), David Hanley (Grace Osteoporosis Centre and Division of Endocrinology and Metabolism, Department of Medicine, University of Calgary, Calgary, Alberta, Canada), Daylily S Ooi (Department of Pathology and Laboratory Medicine, University of Ottawa, Ottawa, Ontario, Canada), Leanne Ward (Department of Pediatrics, University of Ottawa, Ottawa, Ontario, Canada), and The University of Ottawa Evidence-based Practice Center, Ottawa, Ontario, Canada: Nick Barrowman, Manchun Fang, Chantelle Garritty, Tanya Horsley, Vasil Mamaladze, David Moher, Margaret Sampson, Alex Tsertsvadze, and Fatemeh Yazdi
ABSTRACT
The objective of this evidence review was to synthesize the literature on the effectiveness and safety of nutritional and ultraviolet radiation sources of vitamin D with respect to bone health outcomes at all stages of life. The goals were to identify knowledge gaps for the research community and to highlight areas that required further research. We completed an extensive literature search of multiple databases and a multilevel selection process with synthesis of results from 167 included studies. We included a variety of outcomes (eg, falls, bone mineral density, fractures, and adverse events). This report provides an overview of the methods and a summary of the key findings. In addition, we discuss areas where the evidence is inconclusive, as well as methodologic issues that we encountered. We found inconsistent evidence of an association between serum 25-hydroxyvitamin D [25(OH)D] concentration and bone mineral content in infants and fair evidence of an association with bone mineral content or density in older children and older adults. The evidence of an association between serum 25(OH)D concentration and some clinical outcomes (fractures, performance measures) in postmenopausal women and older men was inconsistent, and the evidence of an association with falls was fair. We found good evidence of a positive effect of consuming vitamin D–fortified foods on 25(OH)D concentrations. The evidence for a benefit of vitamin D on falls and fractures varied. We found fair evidence that adults tolerated vitamin D at doses above current dietary reference intake levels, but we had no data on the association between long-term harms and higher doses of vitamin D.
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  T. Kulie, A. Groff, J. Redmer, J. Hounshell, and S. Schrager Vitamin D: An Evidence-Based Review J Am Board Fam Med, November 1, 2009; 22(6): 698 - 706. [Abstract] [Full Text] [PDF]
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 E. A Yetley, D. Brule, M. C Cheney, C. D Davis, K. A Esslinger, P. W. Fischer, K. E Friedl, L. S Greene-Finestone, P. M Guenther, D. M Klurfeld, et al. Dietary Reference Intakes for vitamin D: justification for a review of the 1997 values Am. J. Clinical Nutrition, March 1, 2009; 89(3): 719 - 727. [Abstract] [Full Text] [PDF]
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P. M Brannon, E. A Yetley, R. L Bailey, and M. F. Picciano Overview of the conference "Vitamin D and Health in the 21st Century: an Update" Am. J. Clinical Nutrition, August 1, 2008; 88(2): 483S - 490S. [Abstract] [Full Text] [PDF]
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