L-ARGININE XTREME is the highest quality preparation containing L-arginine in a readily bioavailable form. Not only does this amino acid build protein structures but also makes an intermediate product in the biosynthesis of particles participating in important metabolic pathways. L-arginine is a precursor of nitrogen oxide (NO), creatine, ornithine and agmatin. L-ARGININE XTREME facilitates everyday diet replenishment with L-arginine.