Is Threonine Vegetarian?

Threonine is one of the essential amino acids, meaning it must be obtained through diet as the body cannot synthesize it. It plays a critical role in protein synthesis, central nervous system function, and maintaining the immune system. It is found in high-protein foods, both animal-based such as meat, fish, and dairy, as well as plant-based sources like legumes and nuts, making it suitable for vegetarians.