Many people believe that high cholesterol in the blood is the cause of heart disease, especially some doctors and dietitians who also hold such a view and tell people through the media that it is very important to manage cholesterol. However, in fact, cholesterol may not be the culprit of cardiovascular diseases because more than half of the patients with cardiovascular diseases have normal cholesterol levels. In the face of such a fact, is cholesterol still the culprit leading to cardiovascular diseases? If some doctors still keep emphasizing that cholesterol is the culprit of cardiovascular diseases, it is really incomprehensible. When it comes to cholesterol, we must talk about lipoproteins, which are categorized into celiac disease, very low density lipoproteins, low density lipoproteins and high density lipoproteins, of which low density lipoproteins are responsible for transporting cholesterol from the liver to all tissues and cells throughout the body, while high density lipoproteins are responsible for recovering cholesterol discharged to the blood after cellular metabolism, and transporting it to the liver for processing. During a physical examination, if we have a problem with our metabolism, it often leads to dyslipidemia, and people use changes in blood lipids to determine the extent of the disease. Thus, dyslipidemia is a condition, and elevated LDL cholesterol is both a cause and a symptom, a manifestation of the disease. If we only treat the symptoms but not the cause of the disease, the treatment of the disease is tantamount to treating the head when there is a headache and treating the foot when there is a footache. Why does blood lipid rise? Why is cholesterol deposited in blood vessels? Is LDL cholesterol really harmful? LDL cholesterol is an essential nutrient for the human body, without which there would be no life, let alone health. More or less of it in the bloodstream is not good and is a response to disease. So why do some people still call it “bad cholesterol”? The reason is that low-density lipoprotein (LDL) is confused with oxidized LDL, which is harmless to health, and oxidized OX-LDL, which is harmful. In the early 1980s, doctors discovered that there was good and bad cholesterol. HDL (high-density lipoprotein cholesterol) was considered good, and LDL (low-density lipoprotein cholesterol) was considered bad. LDL cholesterol collects on the walls of arterial blood vessels, causing deposits and narrowing of the arteries. However, LDL cholesterol itself is not bad; it is an important element in the construction of cell membranes and other cellular structures, as well as for many of the hormones the body needs. Even if a person can’t get enough LDL from food, our bodies can produce it. The problem is that LDL is changed under the action of free radicals, and this oxidized LDL is remembered as OX-LDL, which is different from normal LDL, and it can not be absorbed and utilized by the body, so these oxidized LDL stay in the blood leading to elevated blood lipids (LDL), and when they pass through the walls of the blood vessels, they stick to the walls of the blood vessels as they can not pass through them, leading to blood vessel blockage. Two days ago, I talked about this issue with a friend in the nutrition sector, that the prevention of cardiovascular disease, lowering blood cholesterol there is a misunderstanding, the key to managing cholesterol is not to control the intake of cholesterol, but to prevent the oxidation of lipids. To prevent lipid oxidation, one should adjust the type of fatty acid intake, and the other is to consume sufficient antioxidant food. Lipid oxidation is an important factor in human aging and many diseases. The lower the saturation in natural fats and oils, the easier they are oxidized, and the higher the saturation, the less likely they are to be oxidized, but this does not mean that we all go to saturated fats, but rather a balanced intake. The current situation is that the intake of linoleic acid, a polyunsaturated fatty acid, is grossly overloaded. This fatty acid is easily oxidized, and its derivatives in the body are closely associated with a wide range of chronic diseases, such as cardiovascular and cerebral vascular diseases, diabetes, cancer, arthritis, asthma, and so on. This fatty acid is found in abundance in a variety of vegetable oils, and in emphasizing the replacement of animal fats with vegetable oils, people have been misled into consuming grossly excessive amounts of linoleic acid. The high intake of linoleic acid is also exacerbated by the belief that this fatty acid is healthy because it is an essential fatty acid for the human body. Do not know that excessive linoleic acid is as harmful as endless, as your blood lipids rise, as let you disease. Healthy living requires balanced nutrition, not food with a certain nutritional value. It is understandable that businessmen conduct misleading publicity for their own interests, but it is hard to understand that medical and nutritional professionals also follow the trend of fooling the public. The point is that people follow the guidance of these professionals, a variety of chronic diseases have not been effectively controlled, and the incidence of disease is getting higher and higher, this is not worth letting people think about it?