Does a high UV environment ensure adequate Vitamin D status?

Michael Kimlin*, Simone Harrison, Madeleine Nowak, Michael Moore, Alison Brodie, Carolyn Lang

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

85 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)139-147
Number of pages9
JournalJournal of Photochemistry and Photobiology B: Biology
Volume89
Issue number2-3
DOIs
Publication statusPublished - 14 Dec 2007
Externally publishedYes

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