Nitraflex is # 1 for maximized hyperemia (pumps) and muscle torque. It features an advanced, 6-part nitraflex nutrient-partitioning blend: a potent proprieceutical blend designed to "open the floodgates", the uptake and storage of more nutrients, glycogen and blood into the muscle cell. Phenomenal hyperemia and vasodilation attributes to much fuller muscle pumps and performance...and super-human strength! Its proprieceutical properties include a high citrulline:argenine ratio and unique ratios of key clinically-studied cognitive enhancers including 1, 3, 7-trimethyl-1H-purine-2, 6 (3H,7H)-dione, 2-(Dimethylamino)ethanol and 2-Amino-4-(ethylcarba-moyl) butyric acid to support immediate energy, alertness and focus during high-intensity exercise. And a testosterone-elevating complex with calcium fructopyranose borate (CFB) to increase testosterone in healthy subjects to build muscle tissue. Plus, it's creatine-free! To prevent undesirable water retention, GAT scientists purposely did not add creatine to the formula.