beta CaroteneCarotenoidsVitamin EVitamin AOral Submucous FibrosisAntioxidantsVitaminsSubstance PDietary SupplementsPhycomycesDouble-Blind Methodalpha-Tocopherolbeta-Carotene 15,15'-MonooxygenaseSmokingzeta CaroteneGeranylgeranyl-Diphosphate GeranylgeranyltransferaseCataractRiskIncidenceTreatment FailureXanthophyllsInterleukin-1betaFollow-Up StudiesLuteinCardiovascular DiseasesIntramolecular LyasesSubstance-Related DisordersProportional Hazards Modelsbeta 2-MicroglobulinLung NeoplasmsDaucus carotaVitamin A DeficiencyPlants, EdibleNorisoprenoidsReceptors, Adrenergic, betaIntegrin beta3DietFruitMucoralesErwiniaReceptors, Neurokinin-1Substance Abuse Treatment Centers