| Higher vitamin D intake is needed to achieve serum 25(OH)D levels greater than 50 nmol/l in Québec youth at high risk of obesity. | |
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MedLine Citation:
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PMID: 21364606 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Background/Objectives:Vitamin D levels are often observed to be low in Canadian youth, despite the mandatory fortification of fluid milk. We identified modifiable correlates of plasma vitamin D concentrations to inform public health efforts to remediate low-vitamin D status.Subjects/Methods:We recruited 159 children aged 8-11 years, who were at at high risk of obesity, non-systematically during different seasons. Vitamin D status was assessed by measuring plasma 25-hydroxyvitamin D (25(OH)D) using a radioimmunoassay. Dietary intake, including vitamin supplements, was measured using three dietitian-administered 24 h diet recalls. Fat mass was measured by dual energy X-ray absorptiometry. Accelerometers were worn for 7 days to estimate physical activity. Independent correlates of plasma 25(OH)D concentrations were identified using multiple regression in an analysis controlling for season of measurement.Results:Approximately, 7% of youth had hypovitaminosis D (25(OH)D 37.5 nmol/l) during winter and spring when vitamin D levels are at their nadir. Only 55% of participants had vitamin D levels, which the Institute of Medicine considers optimal (25(OH)D >50 nmol/l). The mean dietary vitamin D intake, 6.6 mcg, was well below current recommendations set at 15 mcg. A serving increase in milk consumption and a s.d. increase in physical activity were associated with only a 2.9 and 2.1 nmol/l increase in plasma 25(OH)D, respectively. There was no association between 25(OH)D and adiposity.Conclusions:Our results indicate the challenges of obtaining adequate vitamin D intake from the current food supply to support a level of 25(OD)D >50 nmol/l.European Journal of Clinical Nutrition advance online publication, 2 March 2011; doi:10.1038/ejcn.2011.5. |
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Authors:
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S Mark; M Lambert; E E Delvin; J O'Loughlin; A Tremblay; K Gray-Donald |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-02 |
Journal Detail:
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Title: European journal of clinical nutrition Volume: - ISSN: 1476-5640 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-2 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8804070 Medline TA: Eur J Clin Nutr Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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School of Dietetics and Human Nutrition, McGill University, Montreal, Quebec, Canada. |
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