China people say edible fat mainly refers to fat pork, such as pork belly and elbow meat.

Nutritional components:

The main component of fat meat is fat (mainly saturated fatty acids), just like "compressed biscuits". Among the fat meat as much as lean meat, fat meat can provide higher calories for the human body. Fat also contains lecithin and cholesterol that the human body needs.

Food action

Dongpo meat fat contains lecithin and cholesterol needed by human body. Cholesterol is an essential substance for brain, liver, heart and kidney, and it is also the main raw material for many endocrine hormones such as sex hormones in human body. Some cholesterol can be converted into vitamin D by ultraviolet irradiation. Foods with high fat content can resist hunger, maintain the normal metabolism of protein, dissolve vitamin A, vitamin D, vitamin E and vitamin K, and promote the absorption and utilization of these vitamins.

If people don't eat or eat very little fat for a long time, it is easy to keep their body in a low cholesterol state, which will lead to other diseases, such as arteriosclerosis, anemia, cancer and malnutrition. Therefore, it is good to eat some fat properly. There are also many popular fatty dishes in China, such as braised pork, Dongpo pork, tiger skin braised pork and braised elbow. Although these dishes should not be eaten more, it is ok to eat some in moderation.

Edible population

People with high physical exertion should eat more fat, which can better meet their physical needs.

However, because fat contains more saturated fatty acids and cholesterol, people with certain diseases, such as hypertension and coronary heart disease, should eat less or not.

Recommended food intake

Generally speaking, the daily fat intake of China residents should not exceed 50g.

lean meat

Don't eat more than two ounces of lean meat every day.

Eating too much lean meat is also harmful to human health. If lean pork is the main food source in daily diet, it will increase the risk of cardiovascular diseases such as hyperlipidemia and atherosclerosis.

The Institute of Nutrition and Food Safety of China Center for Disease Control and Prevention determined the fat of various animal meats.

According to the food composition table of China in 2002, taking the weight of 100g as an example, the fat content of various meats is as follows: rabbit meat 2.2g, horse meat 4.6g, beef 4.2g, and lean pork 7.9g If lean pork is the main food source in daily diet, it will also increase the risk of cardiovascular diseases such as hyperlipidemia and atherosclerosis.

Recently, the analysis of Dr. Boubiss from the Royal Institute of Britain shows that eating lean meat is more harmful to human health than fat meat, because in the cooking process, lean meat will automatically produce a carcinogen-heterocyclic amine. Animal experiments show that heterocyclic amine is a substance that damages genes, and it can induce the mutation of DNA in vivo. Heterocyclic amines in lean meat can be directly absorbed into the blood by the large intestine. The incidence of intestinal cancer in western countries is higher than that in other countries, which is related to their frequent eating of lean meat, especially red meat steak.

In addition, the content of methionine in lean meat is high. Methionine is an essential amino acid for human body to synthesize some hormones and maintain epidermal health. However, methionine is catalyzed and activated by some enzymes, and an organic substance called homocysteine will be produced during thermophysical and chemical treatment. Modern medicine believes that homocysteine can directly damage endothelial cells in arterial wall, promote the deposition of lipids such as cholesterol and triglyceride in blood and penetrate into arterial wall, form atherosclerotic plaque, and then cause atherosclerosis. Eating too much lean meat will increase the content of methionine and homocysteine, thus accelerating the occurrence of atherosclerosis.

It can be seen that the consumption of lean meat should not be restricted because it has less saturated fatty acids. Generally speaking, the daily meat intake of adults should be 1 ~ 2, which can be increased or decreased according to personal weight and obesity. If protein needs to be supplemented, the intake of milk and bean products can be appropriately increased.

Western nutritionists believe that the incidence of breast cancer and rectal cancer in Asian countries such as China and Japan is lower than that in western countries, which is related to the frequent consumption of soybeans and their bean products in Asian countries. Soybean contains an anticancer active substance-isoflavones, 2/3 of which are trihydroxyisoflavones. It has obvious antimutagenic effect on strong carcinogens-benzo (a) pyrene and methylphenyanthracene, and has strong inhibitory effect on breast cancer and colorectal cancer. Therefore, people are encouraged to eat less lean meat and more soybeans and their products to keep healthy.

Do not buy lean meat with thin skin and bright red color.

1June 10, the animal husbandry and public security departments of Xiangtan jointly announced that with the concerted efforts of the public security and animal husbandry departments, a clenbuterol case that had the greatest impact on Xiangtan was detected. The investigation process of this case lasted more than one year, and the two departments jointly recovered 7 kilograms of clenbuterol. It is reported that 100 kilograms has flowed into Xiangtan, Zhuzhou, Loudi and other places in our province before.

Clenbuterol, the scientific name of clenbuterol, is neither a veterinary drug nor a feed additive, but an adrenal nerve stimulant. Eating pigs can promote the synthesis of protein, accelerate the transformation and decomposition of fat, and improve the lean meat rate of pork, so it is called "lean meat". However, the dosage must be more than 10 times that of human body in order to improve the lean meat rate. Due to the large dosage, long use time and slow metabolism, "Clenbuterol" remains in pigs until it is slaughtered and marketed. When it enters the human body through food, it will lead to chronic poisoning of the human body and cause great hidden dangers to the health of consumers.

When consumers buy pork, they should choose some fat meat (1-2cm). The skin should not be too thin and the color should not be too bright red.