The difference between plant protein and animal protein is that there are certain differences in amino acid composition and quantity. There is not much difference between plant protein and animal protein in nature. Plant protein lacks immunoglobulins, while cereals are relatively lacking in lysine and other components. The absorption of plant protein is relatively more difficult than that of animal protein. Plant protein is difficult to digest because it is wrapped in fiber. Compared with human nutritional structure, animal protein is more suitable for humans, and its protein type and structure are closer to the protein structure and quantity of the human body. The difference between animal protein and plant protein: 1. Generally speaking, the difference between plant protein and animal protein is not big, but there are certain differences in amino acid composition and quantity. 2. Although plant protein comes from a wide range of sources, there is still a certain gap between the type of protein and the needs of the human body. For example, plant protein lacks immunoglobulins, lysine and other ingredients. 3. Human digestion and absorption of plant protein is worse than animal protein. Animal protein is relatively consistent with human nutritional needs, and generally contains 8 essential amino acids for the human body. Therefore, animal protein has higher nutritional value than plant protein. Animal protein is easier to digest and absorb than plant protein. Since animal protein is homologous to humans, animal protein comes from meat, eggs, milk, etc. of poultry, livestock, fish, etc., mainly casein, and contains essential amino acids. The variety is relatively complete and the nutritional value is high. Plant-based protein mainly comes from rice, noodles and beans, and has less or even lack of essential amino acids, such as lysine, methionine, etc. Bean protein has the highest nutritional value among plant-based proteins and contains no cholesterol.