Increases blood flow+ L-arginine naturally produces nitric oxide, an important biological regulator that is critical for the cellular messaging network. L-arginine promotes vasodilatation by increasing nitric oxide production in active muscles during exercise. Vasodilatation elevates blood flow to the exercising muscle and enhances the metabolic response to exercise.
Clears waste products from muscles+ L-citrulline is a key intermediate compound in the urea cycle, the biochemical pathway that humans use to get rid of nitrogen waste such as ammonia. Excess L-citrulline in the body through supplements can help the urea cycle more efficiently and quickly remove the ammonia produced by working muscles before it can cause its (tiring) effects.
Longer workouts possible+ During intense exercise, muscle pH drops, resulting in acid build-up, including lactic acid. The more lactic acid build-up, the more quickly muscle fatigue sets in. Rapid removal of lactic acid and lessening the pH drop in muscles from extreme exertion can also reduce the soreness felt from the workouts. By ridding the body of ammonia and lactate build-up, one can exercise longer and therefore build more muscle mass.