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Biochemical indicators of B vitamin status in the US population after folic acid fortification: results from the National Health and Nutrition Examination Survey 1999–2000

Vitamin NutritionNutritionNutrient BioavailabilityUs PopulationPublic Health NutritionB Vitamin StatusNutritional SciencesVitamin B ComplexHuman NutritionPublic HealthNutritional ScienceMicronutrientsMicronutrient SupplementationFolic Acid FortificationNutrition Assessment