Intestinal AbsorptionAbsorptionIntestine, SmallIntestinesIntestine, LargeJejunumIntestinal MucosaIleumBiological AvailabilitySkin AbsorptionDuodenumSpectrophotometry, AtomicX-Ray Absorption SpectroscopyEnterocytesColonSpectrophotometryCaco-2 CellsAdministration, OralIronMicrovilliFecesZincSpectrum AnalysisDigestive SystemZinc RadioisotopesBiological TransportPhytic AcidCecumLiverTissue DistributionLymphMalabsorption SyndromesDietIron RadioisotopesKineticsZinc IsotopesSpectrophotometry, UltravioletHydrogen-Ion ConcentrationIntestinal NeoplasmsSitosterolsSwineWaterGastrointestinal TransitSodiumIntestinal DiseasesSerous MembraneIntestinal SecretionsDigestionRats, Sprague-DawleyBile Acids and SaltsStomachTime FactorsGastrointestinal TractBileRats, Inbred StrainsGastrointestinal MotilityEpitheliumCholesterolRats, WistarIron, DietaryAzetidinesDigestive System Physiological PhenomenaCalcium, DietaryPerfusionFerrous CompoundsCopperChromatography, High Pressure LiquidRNA, MessengerChloridesRabbitsMolecular Sequence DataAnimals, SucklingGerm-Free LifeSodium-Glucose Transporter 1Biological Transport, ActiveGlucosePhytosterolsBicarbonatesIntubation, GastrointestinalSucraseCalciumDose-Response Relationship, DrugGastrointestinal ContentsLymphatic SystemArea Under CurveSpectrophotometry, InfraredMice, Inbred C57BLOrgan SpecificityAmino AcidsKidneyPhlorhizinXyloseCattleGastric EmptyingTrioleinDietary FatsCross-Over StudiesIleostomyModels, BiologicalInjections, Intravenous