TretinoinKeratolytic AgentsVitamin ALentigoAcne VulgarisVitaminsVitamin DOintmentsVitamin EAdministration, TopicalSkin AgingCosmeticsVitamin B 12Vitamin A DeficiencyChemexfoliationDermatologic AgentsHyperpigmentationVitamin D DeficiencyAcitretinMelanosisNicotinic AcidsEmollientsTrichloroacetic AcidKeratosis, ActinicVitamin K 1Skin CareFacial InjuriesVitamin B 6Vitamin E DeficiencyVitamin B 12 DeficiencyCarcinoma, Basal CellVitamin K DeficiencyVitamin B 6 DeficiencyRetinoidsCholecalciferolAscorbic AcidSkinSkin PigmentationAdministration, CutaneousDietary SupplementsReceptors, CalcitriolVitamin D-Binding ProteinDrug CombinationsDouble-Blind MethodPyridoxineVitamin K 2CalcifediolCalcitriolVitamin B DeficiencyErgocalciferolsVitamin K 3Antineoplastic AgentsAntioxidantsDietVitamin K Deficiency BleedingFolic AcidTreatment OutcomeAvitaminosisRicketsSunlightNutritional Statusalpha-Tocopherolbeta CaroteneSodium-Coupled Vitamin C Transporters25-Hydroxyvitamin D3 1-alpha-HydroxylaseVitamin K Epoxide ReductasesHydroxycholecalciferolsHomocysteineTranscobalaminsTocopherolsNutritional RequirementsFood, Fortified25-Hydroxyvitamin D 2Parathyroid HormoneMethylmalonic AcidVitamin D Response ElementCarbon-Carbon LigasesDihydroxycholecalciferolsCarotenoidsCalcium, DietaryRiboflavinPyridoxal PhosphateXerophthalmiaHypervitaminosis A24,25-Dihydroxyvitamin D 3Pyridoxic AcidThiamineLiverFolic Acid DeficiencyMineralsCobalt IsotopesRetinol-Binding ProteinsMicronutrientsSeleniumCalciumNutrition PolicyCholestanetriol 26-MonooxygenaseBone and BonesPyridoxalDose-Response Relationship, Drug