Cited from Baidu: Vegetable butter belongs to hydrogenated modified fats, containing trans fatty acids, which are even more harmful than saturated fats (lard) and others. For a long time, people have believed that margarine comes from vegetable oils and does not cause obesity like animal fats, and that eating more of it is harmless. However, in recent years, research has allowed people to gradually see its true colors: "safe fat" can actually lead to heart disease and diabetes and other diseases. Margarine you know? Foods containing trans fatty acids are so common that we almost always come into contact with them. Trans fatty acids in real life is margarine or margarine. Trans fatty acids are found in very small amounts in natural foods. Most of the trans fatty acids that people usually eat are formed by hydrogenation of vegetable oils, which is a man-made process that hardens the unsaturated fats in the liquid state of vegetable fats and oils by hydrogenation. To put it plainly, it is the liquid vegetable oil that is turned into solid or semi-solid fats in order to prevent it from deteriorating, to make it easier to preserve, or to improve the taste, and this is the trans fat. Trans fatty acids are used by many food manufacturers." There are reports that McDonald's has no plans to change its plans to use healthier cooking oils for now because eliminating TFAs would reduce the flavor of its fries. Trans fatty acids affect us in two forms: one that disrupts the foods we eat and one that alters our body's normal metabolic pathways. Safflower, corn, and cottonseed oils, which contain polyunsaturated fats, can reduce cholesterol levels, but when hydrogenated to trans fatty acids, they do the opposite; they are still not as harmful as saturated fats, but they raise blood cholesterol levels. The most influential of the cholesterol is LDL (low-density lipids), or bad cholesterol, which increases the risk of coronary heart disease (CHD). HDL (high-density lipids) is the good cholesterol, which reduces the risk of coronary heart disease (CHD). In addition, trans fatty acids have been linked to the development of breast cancer