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Lysine, also known as growth amino acid, is an essential substance for the synthesis of human and animal tissue proteins. It is also the main component of important substances such as enzymes, hormones, and antibodies in the body. It has a very important position in the food industry, aquaculture and feed industry. This article reviews the application of lysine in pig breeding.

As a feed additive, dicalcium phosphate mainly provides phosphorus, calcium and other mineral nutrients for livestock and poultry compound feed, which is easy to digest and absorb.

Betaine as a methyl donor can partially replace choline; choline and betaine can partially replace methionine. However, its substitution effect should be comprehensively considered according to the composition of the diet, the specific nutritional needs of the animals, and the price.

The organic trace elements commonly used in piglets are copper (Cu), iron (Fe), zinc (Zn), manganese (Mn), and selenium (Se), and their distribution in pigs is different. Although pigs require a small amount of them, their role is very important. They are involved in nutritional metabolism processes such as protein, amino acids, nucleic acids, carbohydrates and vitamins, and are also necessary for physiological functions such as reproduction, immunity, growth and development.