[9] As an essential amino acid, threonine is not synthesized in humans, and needs to be present in proteins in the diet.

[19] An essential amino acid, threonine is involved in the metabolism of fats, the creation of proteins, the proliferation and differentiation of embryonic stem cells, and the health and function of the intestines.

Intestinal inflammation and energy metabolism disorders in animals may be alleviated by appropriate amounts of dietary threonine.

Nevertheless, because these effects pertain to the control of nutrition metabolism, more research is required to confirm the results in various animal models.

Furthermore, more research is needed to understand how threonine controls the dynamic equilibrium of the intestinal barrier function, immunological response and gut flora.

[20] Foods high in threonine include cottage cheese, poultry, fish, meat, lentils, black turtle bean[21] and sesame seeds.