VITAMIN D DEFICIENCY IS COMMON, EVEN IN SUNNY CLIMATE, IN USA

Individuals who live in sunny climates are at risk of Vitamin D deficiency, Researchers analyzed serum levels of 25- hydroxy vitaminD in 637 residents of southern Arizona, Vitamin D deficiency which was defined as 25-hydroxyvitamin D below 20 ng/ml (50 nmol/ L) , was found in 25% of the residents. Many scientists now believe that optimal Serum levels of 25- hydroxyvitamin Dare within the range of 30-50 ng/ ML (75-125 nmol/ l. Deficiency of VitaminD in residents of a sunny region is a significant public health concern because, " Recent work has associated suboptimal concentration of circulating 25- hydroxyvitamin D with a number of diseases".

Peer review Journal cited above is ---------
Grant WB, Holick MF, Benefits and reqirements of Vitamin Dfor Optimal Health : A review. ALTERN MED REV>2005 JUN, 10(2) :94-111.