title: The good, the bad, and the ugly.
authors: Richard P
authors: RP
authors: Holm
mesh_terms: D000339:Affect; D006801:Humans; D015595:Skin Aging; D012871:Skin Diseases / Q000209:etiology*; D012878:Skin Neoplasms / Q000209:etiology; D014466:Ultraviolet Rays / Q000009:adverse effects; D014807:Vitamin D / Q000096:biosynthesis*
chemical_list: D014807:Vitamin D