Pork liver is not a protein, but it contains more protein. Pig liver is a kind of food, any kind of food is a mixture, containing protein, carbohydrates, vitamins, minerals and many other nutrients, protein is only one of the nutrients. Pig liver nutrition is very rich and comprehensive, every 100 grams of pig liver contains 129 calories, of which 5 grams of carbohydrates, 19.3 grams of protein, 3.5 grams of fat, vitamin A4972 micrograms, vitamin C20 mg, calcium 6 mg, iron 22.6 mg. The iron and vitamin A content of pig liver rank high among similar foods. Pig liver protein is a high-quality animal protein, containing eight essential amino acids, smooth texture, very good absorption, suitable for children, teenagers to supplement protein, especially for women during physiological period. Moderate consumption of pig liver can provide the body with rich nutrients, which is conducive to good health. However, pig liver has high cholesterol and purine content, patients with hypercholesterolemia and hyperuricemia need to limit their intake of pig liver. Healthy people are recommended to consume it together with vegetables, etc. to balance the nutrition.