Ascorbic AcidAscorbic Acid DeficiencyUrineDehydroascorbic AcidScurvyAntioxidantsL-Gulonolactone OxidaseSodium-Coupled Vitamin C TransportersAscorbate Oxidase2,3-Diketogulonic AcidUrinalysisOxidation-ReductionChromatography, High Pressure LiquidRats, Mutant StrainsFree Radical ScavengersGlutathionePhosphorous AcidsIronDietOxalic AcidPicratesVitamin EBiological Availabilityalpha-TocopherolLipid PeroxidationUrine Specimen CollectionChromaffin GranulesFerrous CompoundsLipid PeroxidesFree RadicalsElectrodesElectrochemistryDose-Response Relationship, DrugTime FactorsOxidative StressSubstance Abuse DetectionUric AcidLiverCopperIndicators and ReagentsMalondialdehydeGlucuronatesKidneyOxalatesChromaffin SystemHydrogen-Ion ConcentrationVitaminsRutinChlorobutanolThiobarbituratesHydrogen PeroxideBacteriuriaKineticsFood, FortifiedAbsorptionMalpighiaceaeCreatinineIntestinal AbsorptionGuinea PigsOrganic Anion Transporters, Sodium-DependentSugar Alcohol DehydrogenasesPlant ExtractsPhytic AcidIron, DietarySpecimen HandlingHydroxyprolinePhenolsFruitFood AnalysisAniline HydroxylaseBiological MarkersPhenylenediaminesPeroxidesDopamine beta-HydroxylaseThiobarbituric Acid Reactive SubstancesAdrenal MedullaBeveragesAdministration, OralAdrenal GlandsCells, CulturedRats, WistarPolychlorinated BiphenylsAcetylcysteineHemoglobinuriaPharmaceutical Solutions