Corn oil is an effective component in lowering blood cholesterol levels. Corn oil offers high levels of polyunsaturated instead of saturated fats. Polyunsaturated fats lower blood cholesterol levels. Monounsaturated fats neither lower nor raise blood cholesterol levels. Saturated fats are approximately twice as powerful in raising cholesterol levels as polyunsaturated fats are in lowering them. Corn oil contains about 60 percent polyunsaturated, 25 to 30 percent monounsaturated, and 10 to 15 percent saturated fats.