Reliable; made in a GMP certified facility in America and third party safety tested for purity. Better workouts, stronger pumps; increase energy and stamina, improve recovery time; recommended for bodybuilders, athletes, competitive sports and regular active people. Promoted lean muscle; L Arginine is an essential amino acid that converts into Nitric Oxide, which relaxes blood vessels and boosts blood circulation; expanded blood vessels pump more oxygen to your muscles, increg your endurance. Extra strength L Arginine; combining the power duo of amino acid Arginine Alpha Ketoglutrate (AKG) with Citrulline, plus Niacin and Calcium; this super charged formula packs the 5 optimal Nitric Oxide ingredients for heart health. Heart health; add L-Arginine to your daily exercise for better heart health; aging and unhealthy lifestyles frequently cause reduced blood circulation; when taken daily especially during exercise, nitric oxide is released into the blood vessels, causing them to expand and improve blood flow throughout the body, reducing your heart muscle’s burden. Made in USA. Arazo Nutrition - L-Arginine.