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Recently, epidemiology of Vitamin D deficiency has gained much attention among the scientific community. Based on the reference ranges obtained in one country scientists from everywhere especially from those countries of South Asia and Middle East are reporting a mass level Vitamin D deficiency in people who are apparently healthy [1-4]. Studies have reported that people living in Europe or North America are deficient in Vitamin D [5,6]. These findings are very disturbing, considering the fact that main source of Vitamin D is exposure to sunlight and all countries of these regions are generally having abundant sunshine.

Need to Redefine Population-Specific Reference Values of Vitamin-D