Folate Deficiency in an Urban Safety Net Population

Introduction: Folate deficiency is a known cause of megaloblastic anemia. Serum folate level is therefore a common component of the workup for megaloblastic and other anemias. Following mandatory fortification of grain products with folic acid in the US in 1998, folate deficiency has become relatively rare in both the general population and in hospitalized patients. Some authors have suggested that serum folate levels should be tested rarely if at all in countries with mandatory folic acid fortification given low rates of deficiency, high cost per diagnosis of deficiency, and low rates of supplementation for those found to be deficient. However, given persistent racial, ethnic, and socioeconomic disparities in folate deficiency, these conclusions may not apply to all populations. In this study, we examine the rate at which serum folate testing detected folate deficiency in an urban safety net hospital and the characteristics of patients found to be folate deficient.