- Threonine is an important amino acid that is a building block for proteins in the body. Some foods that are high in L-threonine are cottage cheese, watercress, sesame seeds, soy, meat and fish, lentils, eggs, milk, and gelatin.
- L-threonine has been studied in the treatment of nerve disorders like amyotrophic lateral sclerosis (ALS), multiple sclerosis, and muscle spasms. However, more research is needed.