AbsorptionIntestinal AbsorptionVitamin AVitaminsVitamin DVitamin EVitamin B 12Vitamin A DeficiencyVitamin D DeficiencyVitamin K 1Vitamin B 6Vitamin E DeficiencyVitamin B 12 DeficiencyAscorbic AcidDietVitamin K DeficiencyCholecalciferolVitamin B 6 DeficiencyDietary SupplementsBiological AvailabilityReceptors, CalcitriolSkin AbsorptionVitamin D-Binding ProteinPyridoxineNitrogenNutritional RequirementsJejunumNutritional StatusVitamin K 2FoodPhosphorusCalcitriolNutritive ValueCalcifediolIronSpectrophotometry, AtomicCalcium, DietaryFood, FortifiedFolic AcidX-Ray Absorption SpectroscopyZincMineralsNutritional Physiological PhenomenaAntioxidantsAdministration, OralIntestine, SmallVitamin B DeficiencyEnergy IntakeAnimal Nutritional Physiological Phenomenabeta CaroteneAvitaminosisErgocalciferolsSpectrophotometryCarotenoidsIntestinesMicronutrientsDigestionRicketsDuodenumMalabsorption SyndromesAnimal FeedVitamin K 3Dietary ProteinsNutrition PolicySpectrum Analysisalpha-TocopherolFood AnalysisSunlightFecesLiverPhytic AcidVitamin K Deficiency BleedingBiological TransportTime FactorsCalciumIleumEatingIron, DietaryDietary FatsGlucoseZinc RadioisotopesHydroxycholecalciferolsKineticsWaterBody WeightDose-Response Relationship, DrugIntestinal MucosaAmino AcidsDietary CarbohydratesRiboflavinTranscobalaminsDiet SurveysCaco-2 CellsHydrogen-Ion ConcentrationTocopherolsSpectrophotometry, UltravioletDietary FiberIron RadioisotopesParathyroid HormoneDihydroxycholecalciferols