Vitamin AVitamin B 12Vitamin DVitamin EVitaminsVitamin B 12 DeficiencyVitamin A DeficiencyVitamin D DeficiencyVitamin E DeficiencyVitamin D-Binding ProteinFolic AcidCalcifediolMethylmalonic AcidVitamin K 1Vitamin K DeficiencyAscorbic AcidVitamin B 6SerumDietary SupplementsCholecalciferolNutritional StatusHomocysteineTranscobalaminsFolic Acid DeficiencyXerophthalmiaAnemia, MacrocyticAvitaminosisAnemia, PerniciousSunlightReceptors, CalcitriolVitamin B 6 DeficiencyDiet, Vegetarianbeta CaroteneFood, FortifiedVitamin B DeficiencyVitamin B ComplexSerum AlbuminDietErgocalciferolsCalcitriolNutrition SurveysCarotenoidsBiological MarkersParathyroid HormoneAntioxidantsIntrinsic Factor25-Hydroxyvitamin D3 1-alpha-HydroxylaseMicronutrientsCobalt IsotopesAnemia, MegaloblasticMalabsorption SyndromesPyridoxineCase-Control StudiesVitamin K 2Calcium, DietaryNutritional RequirementsRisk FactorsRetinol-Binding ProteinsCross-Sectional StudiesNight BlindnessReference ValuesSeasonsDigestive System DiseasesPregnancyVitamin KTime FactorsCholesterolSeleniumAscorbic Acid DeficiencyProspective StudiesIntestinal AbsorptionChromatography, High Pressure LiquidLiverSerum Albumin, BovineVitamin K 3Erythrocyte IndicesHyperhomocysteinemiaNutritional Physiological PhenomenaDouble-Blind MethodPrevalenceBone DensityAgingMacrophage-Activating FactorsAbsorptionMetabolic Detoxication, Phase IIHemoglobinsErythrocytesMalondialdehydealpha-TocopherolCalciumBiological AssayVitamin K Deficiency BleedingRicketsLinear ModelsBody WeightCohort StudiesAnalysis of VarianceAge FactorsLipidsIron