title: Penetration of vitamin A acid into human skin.
mesh_terms: D000433:1-Propanol; D006801:Humans; D009824:Ointments; D012869:Skin Absorption; D014212:Tretinoin / Q000008:administration & dosage / Q000378:metabolism*; D014801:Vitamin A / Q000031:analogs & derivatives*
chemical_list: D009824:Ointments; D014801:Vitamin A; D014212:Tretinoin; D000433:1-Propanol