VPX AEX NO is significantly more potent than arginine salts like A-AKG and arginine malate. Designed for complete arginine absorption and utilization. This formula is a potent visible vaso-dilation. AEX (Arginine Ethyl Ester HCl) and cnidium monnier work. Synergistically supports an increase in Nitric Oxide production in the body which may induce more explosive, blood engorged. AEX NO brings muscle pumps and increase blood flow to genital area. PDE-5 is a compound that can prevent prolonged erections. However, Cnidium Monnier blocks PDE-5 production, which allows more intense and extended duration of erection and Vasodilation. Unparalleled Arginine & Nitric Oxide Retention and Duration of Action. Arginase Inhibition to prolong Ethyl Ester HCl Half-Life. Massive Arginine-Induced Cell Volumization. Prolong pumps and enhanced nutrient transport.