Vegetable oil contains phytosterols, which help lower cholesterol. Phytosterols reduce the level of LDL or low-density lipoprotein cholesterol in the blood, by preventing cholesterol absorption in the intestines. Lowering low-density lipoprotein cholesterol rates can help reduce the risk of heart disease.
Vegetable oil also contains unsaturated fats, which are known to prevent atherosclerosis. This condition refers to a hardening of the arteries, caused by saturated fats found in foods, such as butter and fatty meats.
The American Heart Association recommends monounsaturated fats, such as olive, safflower and peanut oils for cooking. These oils reduce low-density lipoprotein cholesterol levels, while providing essential nutrients, including Vitamin E.