TretinoinKeratolytic AgentsLentigoAcne VulgarisOintmentsPropionibacterium acnesAdministration, TopicalSkin AgingCosmeticsDermatologic AgentsChemexfoliationVitamin AHyperpigmentationVitaminsAcitretinVitamin DVitamin EMelanosisNicotinic AcidsEmollientsTrichloroacetic AcidKeratosis, ActinicSkin CareVitamin B 12Facial InjuriesVitamin A DeficiencyCarcinoma, Basal CellVitamin D DeficiencyRetinoidsSkinAdministration, CutaneousSkin PigmentationVitamin K 1Vitamin B 6Vitamin E DeficiencyVitamin B 12 DeficiencyDrug CombinationsDouble-Blind MethodVitamin K DeficiencyVitamin B 6 DeficiencyCholecalciferolAscorbic AcidAcne KeloidAntineoplastic AgentsSebumDietary SupplementsBenzoyl PeroxideTreatment OutcomeReceptors, CalcitriolVitamin D-Binding ProteinPropionibacteriumIsotretinoinPyridoxineVitamin K 2Sebaceous GlandsCalcifediolCalcitriolVitamin B DeficiencyGram-Positive Bacterial InfectionsErgocalciferolsVitamin K 3DietAntioxidantsVitamin K Deficiency BleedingFolic AcidAvitaminosisRicketsSunlightNutritional Statusalpha-Tocopherolbeta CaroteneSodium-Coupled Vitamin C Transporters25-Hydroxyvitamin D3 1-alpha-HydroxylaseVitamin K Epoxide ReductasesHydroxycholecalciferolsHomocysteineAcquired Hyperostosis SyndromeTranscobalaminsTocopherols