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Does a high UV environment ensure adequate vitamin D status?

Kimlin, Michael G., Harrison, Simone, Nowak, Madeleine, Moore, Michael, Brodie, Alison, & Lang, Carolyn A. (2007) Does a high UV environment ensure adequate vitamin D status? Journal of Photochemistry and Photobiology B Biology, 89(2-3), pp. 139-147.

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Abstract

This study assesses the Vitamin D status of 126 healthy free-living adults aged 18–87 years, in southeast Queensland, Australia (27°S) at the end of the 2006 winter. Participants provided blood samples for analysis of 25(OH)D (the measure of an individual’s Vitamin D status), PTH, Calcium, Phosphate, and Albumin, completed a questionnaire on sun-protective/sun-exposure behaviours, and were assessed for phenotypic characteristics such as skin/hair/eye colour and BMI. We found that 10.2% of the participants had serum 25(OH)D levels below 25 nmol/l (considered deficient) and a further 32.3% had levels between 25 nmol/l and 50 nmol/l (considered insufficient). Our results show that low levels of 25(OH)D can occur in a substantial proportion of the population at the end of winter, even in a sunny climate. 25(OH)D levels were higher amongst those who spent more time in the sun and lower among obese participants (BMI > 30) than those who were not obese (BMI < 30). 25(OH)D levels were also lower in participants who had black hair, dark/olive skin, or brown eyes, when compared with participants who had brown or fair hair, fair skin, or blue/green eyes. No associations were found between 25(OH)D status and age, gender, smoking status, or the use of sunscreen.

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ID Code: 26049
Item Type: Journal Article
Keywords: Vitamin D, UV, Population Studies, Evidence, Guidelines
DOI: 10.1016/j.jphotobiol.2007.09.008
ISSN: 10111344
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Deposited On: 01 Jul 2009 16:20
Last Modified: 29 Feb 2012 23:38

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