Vitamin AVitamin DVitaminsVitamin EVitamin B 12Vitamin A DeficiencyVitamin D DeficiencyVitamin E DeficiencyVitamin K 1CholecalciferolPyridoxineVitamin B 12 DeficiencyVitamin B 6Ascorbic AcidCalcifediolVitamin K DeficiencyDietary Supplements25-Hydroxyvitamin D 2Receptors, CalcitriolVitamin KRicketsSunlightErgocalciferolsVitamin D-Binding ProteinNutritional StatusOld Age AssistanceDietVitamin B 6 DeficiencyPyridoxic AcidCalcitriolFat SubstitutesTocotrienolsPyridoxal PhosphateNutritional Requirements25-Hydroxyvitamin D3 1-alpha-Hydroxylase24,25-Dihydroxyvitamin D 3Food, FortifiedHydroxycholecalciferolsCarbon-Carbon LigasesFolic AcidNutrition PolicyAntioxidantsDihydroxycholecalciferolsRetinol-Binding ProteinsAscorbic Acid DeficiencyLiverRetinol-Binding Proteins, PlasmaVitamin K 2Contraceptives, Oral, SyntheticRiboflavin DeficiencyParathyroid HormoneAminopyrine N-DemethylaseBone and BonesSeleniumVitamin B DeficiencyIntestinal AbsorptionCalciumVitamin K 3Dose-Response Relationship, DrugVitamin K Deficiency BleedingPregnancyAvitaminosisSeasonsBody WeightTime FactorsAdministration, Oralalpha-Tocopherolbeta CaroteneLactationBone DensityRisk FactorsDietary Fats, UnsaturatedSodium-Coupled Vitamin C TransportersAnimal FeedBiological MarkersRats, Inbred StrainsVitamin K Epoxide ReductasesErythrocytesHomocysteineCross-Sectional StudiesTranscobalaminsInfant, NewbornTocopherolsProspective StudiesMethylmalonic AcidPrevalenceVitamin D Response ElementKidneyCarotenoidsCalcium, DietaryRiboflavinDouble-Blind MethodFatty AcidsXerophthalmiaHypervitaminosis AChromatography, High Pressure LiquidThiamineFolic Acid DeficiencyMineralsCobalt Isotopes