beta CaroteneCarotenoidsVitamin EVitamin AXanthophyllsAntioxidantsOral Submucous FibrosisLuteinVitaminsAscorbic AcidGeranylgeranyl-Diphosphate GeranylgeranyltransferaseDietary Supplementsbeta-Carotene 15,15'-Monooxygenasealpha-TocopherolDouble-Blind MethodPhycomycesIntramolecular Lyaseszeta CaroteneSmokingCataractCanthaxanthinRiskIncidenceDaucus carotaFruitTreatment FailureNorisoprenoidsFollow-Up StudiesVegetablesDietInterleukin-1betaCardiovascular DiseasesChlorophyllChromatography, High Pressure LiquidVitamin A DeficiencyProportional Hazards ModelsErwiniabeta 2-MicroglobulinLung NeoplasmsAlkyl and Aryl TransferasesOxygenasesPlants, EdibleLightOxidoreductasesPigments, BiologicalReceptors, Adrenergic, betaIntegrin beta3PigmentationMucoralesTocopherolsRhodopsins, MicrobialTerpenesMicronutrientsBiological Availability