L-arginine is an amino acid that your body requires for energy production. While you can get the amino acid arginine from certain foods like meat, poultry and dairy products, people who work out regularly often require more of this important nutrient. L arginine is extremely beneficial for body building because: When you exercise, arginine can be converted to nitric oxide, a substance that increases circulation to the muscles during periods of exertion and after workouts have ended. Helps to reduce muscle breakdown Enhance athletic performance and endurance Help the body recover from exercise faster Support the development of new muscle cells Promotes metabolism Improve concentration and focus Because of its nitric oxide boosting effects, L-arginine supplements are considered to be one of the best recovery supplements for athletes and bodybuilders! Improve strength, power, muscle growth and recovery with Amazing Muscle L-arginine dietary supplement.