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Effect of vitamin D supplementation on vitamin D status and bone turnover markers in young adults

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Barnes, MS, Robson, PJ, Bonham, MP, Strain, JJ and Wallace, Julie (2006) Effect of vitamin D supplementation on vitamin D status and bone turnover markers in young adults. EUROPEAN JOURNAL OF CLINICAL NUTRITION, 60 (6). pp. 727-733. [Journal article]

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DOI: 10.1038/sj.ejcn.1602374

Abstract

Objective: To assess the vitamin D status of healthy young people living in Northern Ireland and the effect of vitamin D supplementation on vitamin D status and bone turnover. Design: Double-blinded randomised controlled intervention study. Setting: University of Ulster, Coleraine, Northern Ireland. Subjects: In total, 30 apparently healthy students ( 15 male and 15 female subjects), aged 18 - 27 years, were recruited from the university, with 27 completing the intervention. Interventions: Subjects were randomly assigned, to receive either 15 mu g ( 600 IU) vitamin D-3 and 1500 mg calcium/day ( vitamin D group), or 1500 mg calcium/day ( control group) for 8 weeks between January and March. Vitamin D status, bone turnover markers, serum calcium and parathyroid hormone concentrations were measured at baseline and post intervention. Results: At baseline, vitamin D status was low in both the vitamin D group ( 47.9 ( s.d. 16.0)) and the control group ( 55.5 ( s.d. 18.6) nmol/l 25( OH) D). Post intervention vitamin D status was significantly higher in the vitamin D-treated group ( 86.5 ( s.d. 24.5)) compared to the control group ( 48.3 ( s.d. 16.8) nmol/l) ( P < 0.0001). There was no significant effect of supplementation on bone turnover markers or PTH concentrations. Conclusions: This study suggests that young adults in Northern Ireland do not consume an adequate daily dietary intake of vitamin D to maintain plasma vitamin D concentrations in the wintertime. A daily supplement of 15 mu g vitamin D-3 significantly increased vitamin D status in these individuals to levels of sufficiency. Achievement of an optimum vitamin D status among young adults may have future positive health implications.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Northern Ireland Centre for Food and Health (NICHE)
ID Code:3577
Deposited By:Dr Julie Wallace
Deposited On:15 Dec 2009 15:28
Last Modified:11 Feb 2013 15:57

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