Vitamin D deficiency alert
September 24, 2012
RESEARCHERS from the University
of Sydney have suggested a review
of current guidelines for Vitamin D
supplementation and testing, after
a study which revealed that “large
segments of the Australian
population are at risk of deficiency
for prolonged periods of the year”.
Professor Steven Boyages from
Sydney Medical School and his PhD
student Kellie Bilinski looked at
vitamin D levels in more than
24,000 samples taken from walk-in
patients and inpatients in NSW
between Jul 2008 and Jul 2010,
investigating the effect of age,
gender, season, socioeconomic
status and remoteness on results.
They found that the lowest point
was reached in early spring, rather
than winter as previously thought,
and that vitamin D deficiency was
“higher and more persistent” than
had been formerly understood.
A previously unidentified at risk
group for vitamin D deficiency was
also found to be females aged 20-
39, with further investigation
required to discover the underlying
cause of this.
Professor Boyages said that
ideally testing should occur in
spring when levels of vitamin D
reach their lowest concentration,
and “similarly, use of vitamin D
supplements currently fails to
address this factor of seasonal
variation”.
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