Lysine is one of essential amino acids.
It catalyzes enzymatic reactions, is involved in protein and carbohydrate metabolism, reduces serum triglycerides, facilitates calcium absorption and maintains nitrogen balance in the body. L-lysine is involved in production of antibodies, hormones, and enzymes, facilitates collagen formation and tissue regeneration, acts as a source of energy, stimulates protein synthesis, bone formation and growth, stimulates cell division and synthesis.
In chicken parent breed, lysine deficiency increases fetal mortality by 5–9 %. With lysine deficiency, breast and leg muscles are insufficiently formed in meat chickens, and it reduces the quality of carcass category and the qualitative composition of meat. Lysine is found in all of the proteins, but vegetable fodder contains its small amounts, thus feed mixtures are often poor in it.