Vitamin DVitamin D DeficiencyVitamin AVitaminsCholecalciferolVitamin EVitamin B 12Receptors, CalcitriolVitamin A DeficiencyCalcifediolCalcitriolErgocalciferolsDietary SupplementsVitamin D-Binding ProteinVitamin K 1SunlightVitamin B 6RicketsVitamin E DeficiencyVitamin B 12 DeficiencyHydroxycholecalciferols25-Hydroxyvitamin D3 1-alpha-HydroxylaseVitamin K Deficiency25-Hydroxyvitamin D 2Parathyroid HormoneVitamin B 6 DeficiencyDihydroxycholecalciferolsVitamin D Response Element24,25-Dihydroxyvitamin D 3Ascorbic AcidCalcium, DietaryChromatography, High Pressure LiquidDietBiotransformationCholestanetriol 26-MonooxygenaseCalciumSteroid HydroxylasesOsteomalaciaVitamin K 2PyridoxineNutritional StatusBone Density Conservation AgentsPhosphorusBone and BonesSeasonsBone DensityAvitaminosisGas Chromatography-Mass SpectrometryNutritional RequirementsHydroxylationMetabolomicsAntioxidantsFood, FortifiedVitamin B DeficiencyMetabolomeDose-Response Relationship, DrugHypocalcemiaVitamin K 3Cytochrome P-450 Enzyme SystemChromatography, LiquidMass SpectrometryFolic AcidHyperparathyroidism, SecondaryAdministration, OralLiverMagnetic Resonance SpectroscopyNutrition PolicyMicrosomes, LiverRisk FactorsHypercalcemiaBiological MarkersOsteoporosisalpha-TocopherolIntestinal AbsorptionVitamin K Deficiency BleedingDouble-Blind Methodbeta CaroteneTandem Mass SpectrometrySkin PigmentationTime FactorsPregnancyOsteocalcinPhosphatesCase-Control StudiesTocopherolsCross-Sectional StudiesMineralsRetinoid X ReceptorsHomocysteineBiological AvailabilityParathyroid GlandsSodium-Coupled Vitamin C TransportersPrevalenceProspective StudiesHypophosphatemia, FamilialVitamin K Epoxide ReductasesRats, Sprague-DawleyKidneyAlkaline PhosphataseFractures, Bone