Amino acids are the matrix or synthetic raw materials of many enzymes and hormones in livestock and poultry, and they are also the basic raw materials for the synthesis of ketones. Therefore, they have the functions of regulating, controlling and affecting physiological and biochemical metabolism in the body, and also have an important impact on the function of the liver.
The growth and development of animals need protein as the raw material of organism development. Adding an appropriate amount of amino acids to the feed can accelerate the synthesis of protein and promote the growth and development of animals. At present, 20 kinds of amino acids in natural protein can be synthesized artificially. Lysine and methionine are mainly used as feed amino acid additives, followed by glutamate, tryptophan, threonine, arginine and glycine.