First of all, it is certain that animal liver is extremely rich in nutrients, which is difficult to be replaced by other foods.

Animal livers are rich in protein, and every 100 grams of pig liver contains 2 1.3 grams of protein, which is twice that of pork.

Animal liver can be called the "king of vitamin A" in food. The vitamin A content of animal liver that people often eat is: sheep liver, beef liver, chicken liver and pig liver from high to low.

As a good blood tonic, the food intake of iron in animal liver is extremely high, and the iron content in duck liver is the highest, which is 23. 1 mg, pig liver is 22.6 mg, chicken liver is 12 mg, goose liver is 7.8 mg and sheep liver is 7.5 mg. Iron is the main component of hemoglobin. Iron deficiency in human body can cause iron deficiency anemia. Iron in animal liver is not only abundant, but also easily absorbed.

In addition, eating animal liver often can provide enough hematopoietic raw materials for the body, making people rosy and refreshed.

Animal liver is also rich in vitamins and inorganic salts, such as vitamin B2, folic acid, nicotinic acid, zinc and selenium.

Animal liver has nutritional "shortcomings"

However, although animal liver is rich in nutrition, it also has some shortcomings. Animal liver is not only high in cholesterol, but also the main detoxification organ in animals. Most of the toxic and harmful substances in food are metabolized by the liver and then excreted. Tests show that there are a small amount of toxic substances scattered in the liver of general animals, which will be harmful to human body if they are not washed repeatedly.

Six Points for Attention in Eating Animal Liver

Liver of healthy animals was selected.

When purchasing, you should choose the livers of livestock that have passed quarantine, and the livers of livestock that have died of illness or unknown cause of death are not edible. The liver of healthy animals is brownish red, smooth and shiny, soft and tender. Fingers can be inserted into the incision with a little force, and it is delicious and tender after cooking.

Wash thoroughly before eating.

First, rinse the liver under tap water for a few minutes, then soak it in cold water for 30 minutes, and then take it out and put it in clean water for repeated cleaning. If you need to eat immediately, you can cut the liver into pieces and put it in clean water and gently scratch it with your hands. Then take it out and put it in a plastic or metal leaky basin, and rinse it repeatedly under the tap water.

Cook thoroughly when cooking.

When cooking, it is forbidden to "stir fry quickly and penetrate quickly", and it is even more impossible to "get out of the pot" for the sake of freshness. It is necessary to cook and fry thoroughly (make the pig liver completely grayish brown, so that no bloodshot can be seen) to ensure food safety.

Do not use with vitamin C.

Animal liver is rich in trace elements such as zinc, manganese and copper. If it is eaten with vitamin C tablets, a chemical reaction will occur, which will lead to the oxidation of vitamin C to dehydroascorbic acid and lose its normal efficacy.

When eating animal liver, especially pig liver, you should eat less other foods high in saturated fatty acids.

Such as meat oil, fat meat, cream, butter, whole milk, etc., in order to prevent saturated fatty acids in these foods from promoting the absorption of cholesterol in pig liver. You can eat some soybeans and bean products while eating pig liver, because the structure of soybean sterol contained in it is similar to cholesterol, which can reduce the absorption of cholesterol by human body.

Intake should be moderate

Taking pig liver as an example, taking 50 ~100g twice a week can meet the body's needs for iron and vitamin A.