Utilization of these essential amino acids as feed additives benefits swine industry by allowing nutritionists to use high levels of supplemental amino acids to replace high cost protein sources [1]; reduce crude protein levels in the diets [2-5]; formulate diets based on ideal protein concept [6-11]; reduce environmental excretion of nitrogen [3,12,13]; and reduce metabolic stress of pigs to detoxify excess ammonia [4,14,15].