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Cognitive impairment linked to low vitamin D blood levels.

In an article scheduled for publication in the Journal of Geriatric Psychiatry and Neurology, Ian Lang, PhD, and colleagues report an association between decreased levels of vitamin D and an increased risk of cognitive impairment in older men and women. *

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The study included 708 men and 1,058 women who participated in the Health Survey for England 2000. Neurocognitive testing revealed cognitive impairment in 212 subjects. The risk of impairment was found to increase with declining levels of serum 25-hydroxyvitamin D. Participants whose blood vitamin D levels were among the lowest 25% of participants experienced an adjusted risk of cognitive impairment that was 2.28 times greater than that of men and women whose vitamin D levels were in the top quarter.

"We need to investigate whether vitamin D supplementation is a cost-effective and low-risk way of reducing older people's risks of developing cognitive impairment and dementia," Dr. Lang observed.

Reference

* Llewellyn DJ, Langa K, Lang I. Serum 25-hydroxyvitamin D concentration and cognitive impairment. J Geriatr Psychiatry Neurol. 2008 Dec 10.

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Title Annotation:IN THE NEWS
Author:Dye, Dayna
Publication:Life Extension
Article Type:Brief article
Geographic Code:1USA
Date:May 1, 2009
Words:173
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