title: Tretinoin for sun-aged skin.
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D007641:Keratolytic Agents / Q000627:therapeutic use*; D015595:Skin Aging / Q000187:drug effects*; D013472:Sunlight / Q000009:adverse effects*; D014212:Tretinoin / Q000627:therapeutic use*
chemical_list: D007641:Keratolytic Agents; D014212:Tretinoin