Soybean oil is the natural inexpensive oil extracted from whole soybeans. It is the most widely used oil in the United States, and is sold as either pure soybean oil or as a main ingredient in vegetable oil. Processed into margarine and shortenings, soybean oil's 85 percent unsaturated fat profile is among the highest of the vegetable oils. Soybean oil contains 61% polyunsaturated fat and 24% monounsaturated fat. Saturated fats in the diet can raise blood cholesterol levels and increase the risk of heart disease. So healthcare professionals recommend replacing saturated fats with unsaturated fats as much as possible.