25-Hydroxyvitamin D3 1-alpha-HydroxylaseMilk SubstitutesCholesterol 7-alpha-Hydroxylase25-Hydroxyvitamin D 2CalcifediolVitamin DVitamin D DeficiencyCholecalciferolHydroxycholecalciferolsSteroid HydroxylasesDihydroxycholecalciferolsErgocalciferols24,25-Dihydroxyvitamin D 3Parathyroid HormoneCholestanetriol 26-MonooxygenaseCalcitriolVitamin D-Binding ProteinPhenylalanine HydroxylaseRicketsSunlightSteroid 21-HydroxylaseReceptors, CalcitriolSeasonsLiver DiseasesLiverHydroxylationTryptophan HydroxylaseDietary SupplementsVitaminsTyrosine 3-MonooxygenaseCytochrome P-450 Enzyme SystemLiver NeoplasmsLiver TransplantationMixed Function OxygenasesMicrosomes, LiverProcollagen-Proline DioxygenasePhosphorusCalcium, DietaryLiver CirrhosisOsteomalaciaCalciumBone DensityKidneyCross-Sectional StudiesChromatography, High Pressure LiquidLiver RegenerationNutritional StatusFatty LiverSkin PigmentationBone and BonesKineticsRisk FactorsBiological MarkersMitochondria, LiverProspective StudiesLinear Modelsalpha 1-AntitrypsinBenzopyrene HydroxylaseBone Density Conservation AgentsDietCase-Control StudiesBase SequenceAdrenal Hyperplasia, CongenitalMolecular Sequence DataTime FactorsHypoxia-Inducible Factor 1, alpha SubunitRNA, Messenger4-Hydroxybenzoate-3-MonooxygenaseEuropean Continental Ancestry GroupFood, FortifiedLiver Function TestsCohort StudiesMass SpectrometryPhosphatesCholestenesPrevalenceDehydrocholesterolsRadioimmunoassayDose-Response Relationship, DrugDrug-Induced Liver InjuryHypoparathyroidismNutritional RequirementsReceptors, Adrenergic, alphaAlkaline PhosphataseNutrition SurveysCloning, MolecularChromatography, LiquidTandem Mass SpectrometrySpectrophotometry, UltravioletRats, Inbred StrainsAfrican AmericansChickensBody Mass IndexAdrenodoxinRecombinant ProteinsIntestinal AbsorptionSubstrate SpecificityAbsorptiometry, PhotonPregnancyBoston