ADM L-threonine 98.5 percent Feed Grade is a highly purified, granular form of supplemental L-threonine. Used with L-lysine, L-threonine helps formulate diets closer to animals’ amino acid requirements, reduce dietary crude protein, decrease nitrogen excretion and improve nitrogen efficiency. Research supports increasing the use of supplemental L-threonine in swine, poultry, aquaculture and pet diets.