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Vitamin D insufficiency prevalent among psoriatic arthritis suffers
Date:7/10/2011

ummer. This cross-sectional study was conducted at two geographically diverse locations; the arthritis clinic in Toronto, Canada was designated the northern site and medical centers in Haifa, Israel were selected for their subtropical southern location.

Vitamin D levels in the blood, known as 25-hydroxyvitman D [25 (OH) D], were used as the primary measure as this takes into account vitamin D synthesized from sunlight as well as from ingested foods. At the northern site, the 25 (OH) D level was insufficient in 56% of PsA patients in the winter and in 59% during the summer. Approximately 51% of patients at the southern location had insufficient 25 (OH) D levels in winter and 62% of patients had insufficient levels in the summer. The level of vitamin D was deficient in 3% of patients at the northern location only in winter; at the southern site vitamin D deficiency was reported in 4% of patients in the winter and in 1% during the summer.

Differences in patient vitamin D levels regarding seasonal or geographical variations were not statistically significant. Levels of vitamin D were not found to affect disease activity in PsA patients. However, Dr. Gladman added, "Additional research is needed to determine if PsA patients require a greater vitamin D intake to maintain healthy levels than that recommended for the general population."


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