Cholesterol has important physiological functions in the body, such as the formation of biofilms and the synthesis of vitamin D, hormones and bile acids. However, excessive cholesterol in the blood [mainly refers to "LDL-C" and/or "total cholesterol" (TC) abnormally elevated] is one of the important causes of atherosclerosis. Most of the cholesterol in the blood (approximately two thirds) comes from cholesterol synthesized by the liver, and only a small part (approximately one third) comes from the digestion and absorption of cholesterol in food. Although dietary cholesterol intake is not the main source of cholesterol in the blood, controlling dietary cholesterol intake (avoiding excessive cholesterol intake) is still the prevention and treatment of dyslipidemia, hypertension, coronary heart disease, atherosclerosis and other Important measures for cerebrovascular diseases. Authorities such as the World Health Organization (WHO), the American Heart Association (AHA) and the Chinese Nutrition Society all recommend that ordinary adults should not consume more than 300 mg of cholesterol per day. In May 2007, the "Guidelines for the Prevention and Treatment of Dyslipidemia in Chinese Adults" issued by the Center for Cardiovascular Diseases of the Ministry of Health required people with high blood lipids to keep their cholesterol intake below 200 mg per day.

　　Animal foods (fish, egg, milk, etc.) generally contain cholesterol, while plant foods generally do not contain cholesterol. The following daily foods contain large amounts of cholesterol and should be highly regarded:

　　1. Pig brain Pig brain (similar to other animal brains) contains a lot of cholesterol, which is called the champion. It contains 2571 mg of cholesterol per 100 grams of pig brain (sheep brain is 2004, bovine brain is 2447). Fortunately, eating pig brain is not common. If you eat animal brains, it is advisable not to exceed one or two times a year.

　　 2. Animal internal organs, such as pig kidney, liver, lung, pig spleen, and pig intestine (the same as animal internal organs of cattle, sheep, chicken, fish, etc.) contain more cholesterol, the approximate content is per 100 viscera contains 200~400 mg cholesterol. Therefore, animal offal should be eaten as little as possible. If you want to eat animal offal, it is better not to exceed 2 times a month.

　　 3. Egg yolk Eggs (other eggs such as duck eggs, goose eggs, quail eggs, etc.) contain a lot of cholesterol, and are mainly concentrated in the egg yolk. One egg (50 grams) contains 292.5 mg of cholesterol. Therefore, the "Dietary Guidelines for Chinese Residents 2007" issued by the Chinese Nutrition Society recommends that ordinary adults eat 0.5 to 1 eggs per day. For insurance of patients with high blood fat, do not exceed 2 or 3 eggs (yellow) per week.

　　Eggs have extremely high nutritional value and are deeply loved by the public, and the cholesterol contained in them has attracted much attention. Although some people have found many reasons, such as "egg yolk contains lecithin, and lecithin can lower cholesterol", "cholesterol in egg yolk is emulsified", but there is currently no evidence that cholesterol in eggs and internal organs What is the difference in cholesterol in fat? Of course, there is currently no evidence that egg consumption is related to dyslipidemia (especially high cholesterol). Therefore, to talk about it is still inseparable from "old management": of course, eggs can be eaten, but not more than 1 per day.

　　 4. Squid (or squid) contains 268 mg of cholesterol per 100 g of squid (fresh weight, water content 80.4%). If you want to eat squid, it is advisable not to exceed once or twice a week.

　　 5. Shellfish, such as fresh shellfish, ark shells, oysters, scallops, abalone, clams, snails, etc. usually contain more cholesterol, and their content is generally between 100 and 200 mg/100 g. The price of this kind of food is high, or the resources are limited, and the consumption is not large.

　　 I have seen reports that the cholesterol contained in shellfish is not ordinary cholesterol, and their structure is relatively special, which will not cause atherosclerosis, but the usual detection methods cannot provide real data. It is a pity that this report does not come from professional research papers, and no similar research evidence can be found in the academic journal database. It is impossible to rule out the possibility that this statement is made up (too many claims about nutrition are made up by making up! ), so it is currently difficult to believe.

　　 6. Others, butter, butter, lamb, lard, tallow and other animal fats contain more cholesterol. Moreover, the saturated fatty acids in these oils and fats can also promote the liver to synthesize more cholesterol. Therefore, avoid eating animal fats.

　　Cholesterol-rich foods are as described above. Of course, controlling cholesterol intake is only one of the measures to prevent the increase of blood cholesterol and the decrease of elevated cholesterol, not all.