Threonine plays an important role in the energetic metabolism and in the protein synthetizing process, it is used in diets intended for pigs and in a lower way in those for avicles. Threonine is part of many physiological processes that involve protein metabolism, the immune response and the preservation of gastrointestinal cells.

Present in high concentrations in antibodies, threonine helps also muscle growth.
Threonine is used in most of intestinal cells during the course of their physiological activity. It is also a fundamental constituent of the musina, a substance present in the mucus that surrounds and protects the intestinal mucosa. It is evident that this substance plays a key role in the digestive processes of animals and optimizes their functional capabilities.