1.? Animal liver is the main organ for animals to metabolize and store nutrients. It is rich in protein, vitamins (such as vitamin A, vitamin D and vitamin B) and trace elements (such as iron and zinc).

2.? Animal liver is rich in iron, such as 22.6 mg iron per100g pig liver, which is more than 7.5 times that of lean pork. This kind of iron mainly exists in the form of heme iron, which has high digestion and absorption rate and helps to prevent iron deficiency anemia.

3.? The content of vitamin A in animal liver is much higher than that in eggs, milk, fish, shrimp and lean meat. One of the most important functions of vitamin A is to maintain eye health, which can effectively prevent and treat eye diseases such as night blindness and dry eye.

Matters needing attention when eating animal liver:

1. Buy fresh, healthy and quarantine animal livers. The liver of healthy animals is glossy reddish brown, with smooth surface and soft texture. The liver of dead animals or animals with unknown causes is definitely inedible.

2. Careful cleaning helps to reduce the residual harmful substances. It's best to rinse it with running water first, then soak it in clear water for about 30 minutes, and then rinse it after soaking.

3. Stir-fry and cook thoroughly before eating. Some people pursue tender taste, and when the liver is slightly stir-fried, the pot will rise, and there is still blood in it. This is not desirable, and it needs thorough heating to ensure food safety.

4. Eat liver in moderation. The liver should not be eaten every day. The average person should eat it once or twice a week, about one or two times each time.

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