beta Carotenebeta-Carotene 15,15'-MonooxygenaseCarotenoidsVitamin EVitamin AOral Submucous FibrosisAntioxidantsVitaminsAscorbic AcidDietary SupplementsPhycomycesDouble-Blind Methodalpha-Tocopherolzeta CaroteneGeranylgeranyl-Diphosphate GeranylgeranyltransferaseSmokingCataractRiskIncidenceTreatment FailureXanthophyllsRetinoidsInterleukin-1betaFolic Acid TransportersFollow-Up StudiesLuteinOxygenasesCardiovascular DiseasesIntramolecular LyasesAdipocytes, WhiteProportional Hazards Modelsbeta 2-MicroglobulinDietLung NeoplasmsDaucus carotaVitamin A DeficiencyNorisoprenoidsPlants, EdibleReceptors, Adrenergic, betaIntegrin beta3MucoralesFruit