title: The unsettled question: butter or margarine?
mesh_terms: D002079:Butter / Q000032:analysis*; D002170:Canada; D005227:Fatty Acids; D006801:Humans; D007880:Legislation, Drug; D008383:Margarine / Q000032:analysis*
chemical_list: D005227:Fatty Acids; D002079:Butter; D008383:Margarine