AbsorptionIntestinal AbsorptionCholesterol, DietaryMice, Inbred AKRCholesterolBile Acids and SaltsSkin AbsorptionBiological AvailabilitySpectrophotometry, AtomicJejunumX-Ray Absorption SpectroscopySpectrophotometryEfficiencyIronSpectrum AnalysisKineticsIntestine, SmallEfficiency, OrganizationalAdministration, OralZincZinc RadioisotopesPhytic AcidSpectrophotometry, UltravioletWaterIron RadioisotopesDuodenumIntestinesZinc IsotopesFeces