Corn oil is a nonhydrogenated oil derived from the kernel of corn. The refined product is tasteless and odorless. High in polyunsaturates, it is used for frying, as a shortening in baking., salad dressings, margarine, etc. Corn oil is also used as a skin soother and softener (emollient). It is rich in linoleic acid, one of the three essential fatty acids.