Description This synergistic blend of L-Arginine and L-Citrulline is a foundational supplement for athletes. L-Citrulline is converted into L-Arginine in the body, which is then used to produce Nitric Oxide (NO). NO is a potent vasodilator, meaning it widens blood vessels, dramatically improving blood circulation to working muscles. This results in enhanced physical endurance, reduced fatigue, and faster muscle recovery after strenuous exercise.