beta CaroteneCarotenoidsVitamin EVitamin AOral Submucous FibrosisAntioxidantsVitaminsAscorbic AcidDietary SupplementsPhycomycesDouble-Blind Methodalpha-Tocopherolbeta-Carotene 15,15'-Monooxygenasezeta CaroteneGeranylgeranyl-Diphosphate GeranylgeranyltransferaseSmokingCataractRiskIncidenceTreatment FailureXanthophyllsInterleukin-1betaFollow-Up StudiesLuteinIntramolecular LyasesCardiovascular Diseasesbeta 2-MicroglobulinProportional Hazards ModelsLung NeoplasmsDaucus carotaVitamin A DeficiencyNorisoprenoidsPlants, EdibleReceptors, Adrenergic, betaIntegrin beta3DietFruitMucoralesOxygenasesErwinia