A high strength capsule formulation containing 100% pure l-arginine, Bio-Synergy L-Arginine capsules are ideal for endurance and performance athletes, with benefits supported by scientific research. Researchers at the University of Exeter discovered taking a dietary supplement like Bio-Synergy L-arginine may enhance the production of nitric oxide in the body which can significantly boost stamina during high-intensity exercise. The study, published in the August 2010 Journal of Applied Physiology, suggests taking the supplement can allow athletes to exercise up to 20 percent longer. Directions of use: Take two capsules, three times a day with water. Do not exceed the recommended intake.