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    Predictors of vitamin D-containing supplement use in the Australian population and associations between dose and serum 25-hydroxyvitamin D concentrations

    247028_247028.pdf (484.0Kb)
    Access Status
    Open access
    Authors
    Black, Lucinda
    Jacoby, P.
    Nowson, C.
    Daly, R.
    Lucas, R.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Black, L. and Jacoby, P. and Nowson, C. and Daly, R. and Lucas, R. 2016. Predictors of vitamin D-containing supplement use in the Australian population and associations between dose and serum 25-hydroxyvitamin D concentrations. Nutrients. 8 (6): pp. 1-13.
    Source Title
    Nutrients
    DOI
    10.3390/nu8060356
    School
    School of Public Health
    Remarks

    This open access article is distributed under the Creative Commons license https://creativecommons.org/licenses/by-nc-sa/4.0/

    URI
    http://hdl.handle.net/20.500.11937/22564
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 by the authors; licensee MDPI, Basel, Switzerland.Despite concerns about vitamin D deficiency in the Australian population, little is known about the prevalence and predictors of vitamin D-containing supplement use. We described the use of vitamin D-containing supplements, and investigated associations between supplemental vitamin D intake and serum 25-hydroxyvitamin D (25(OH)D) concentrations, using a single 24-h dietary recall from the 2011–2013 Australian Health Survey (n = 12,153; ages = 2 years). Multiple regression models were used to investigate predictors of vitamin D-containing supplement use in adults, and associations between dose and serum 25(OH)D concentrations/vitamin D sufficiency (=50 nmol/L), adjusting for potential confounders. The prevalence of vitamin D-containing supplement use was 10%, 6% and 19% in children, adolescents and adults, respectively. Predictors of vitamin D-containing supplement use in adults included being female, advancing age, higher educational attainment, higher socio-economic status, not smoking, and greater physical activity. After adjusting for potential confounders, a 40 IU (1 µg) increase in vitamin D intake from supplements was associated with an increase of 0.41 nmol/L in serum 25(OH)D concentrations (95% CI 0.35, 0.47; p < 0.001). However, the prevalence of vitamin D-containing supplement use was generally low in the Australian population, particularly for single vitamin D supplements, with most supplement users obtaining only low levels of vitamin D from other supplement types.

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