L-Arginine is an excellent Amino Acid involved in many body functions and systems. Potential applications for supplementation of L-Arginine are weight training and sports nutrition in general, infection, healing of injuries, infertility (male) and impotence. Amino Acids are essential to health. Most form the small structural components of protein and are required for the synthesis of protein within the body. The primary function of most Amino Acids is to furnish the essential material for duplication of the genetic code, for cell division, and for the formation of muscles and connective tissue.