Corn Oil

Even though this popular oil contains mostly unsaturated fat, it is higher in saturated fats than most other oils and is usually highly refined and hydrogenated. Like other polysaturated oils, corn oil does lower total cholesterol. While it lowers LDL, it also lowers HDL cholesterol a bit, yet the result is still an improved HDL-to-LDL ratio. It is not one of the more nutritious oils.