Essential fatty acids must be obtained from foods we choose. Trans Fatty Acids are formed when vegetable oils are processed into margarine or shortening. Sources of trans fats in the diet include snack foods and baked goods made with partially hydrogenated vegetable oil or vegetable shortening. Trans fatty acids also occur naturally in some animal products such as dairy products. Dietary cholesterol is found in food of animal origin such as egg yolks, organ meats, and full fat dairy products.
Blood cholesterol is a waxy substance, which occurs naturally in our body.
It is used to make estrogen and testosterone, and bile, which is needed for digestion. But if the level of cholesterol in the blood is too high, cholesterol and other fats can stick to the artery walls. Since blood cholesterol is waxy and cannot dissolve in water, it is carried through the blood in packages called lipoproteins. HDL cholesterol gathers up excess cholesterol in the blood and carries it to the liver. The liver reprocesses or excretes it.