Skin PigmentationPigmentationPigmentation DisordersMelaninsSkinMelanosomesMelanocytesHyperpigmentationSunlightMonophenol MonooxygenaseReceptor, Melanocortin, Type 1Eye ColorSkin Physiological PhenomenaUltraviolet RaysCyclic AMP-Dependent Protein Kinase RIalpha SubunitErythemaSkin AgingHypopigmentationSkin NeoplasmsSkin DiseasesChromatophoresAlbinismHair Coloralpha-MSHMelanophoresVitamin D DeficiencyClofazimineMultiple Endocrine NeoplasiaDyskeratosis CongenitaVitiligoAdrenal Cortex DiseasesEpidermisMyxomaVitamin D