API's Nitric-X Nitric Oxide (NO) Stimulator is an advanced blend of amino acid compounds arginine alpha-ketoglutarate (A-AKG) and arginine-ketoisocaproate (A-KIC) that deliver a boost in short term Nitric Oxide levels. Nitric Oxide causes an expansion of blood vessels (vasodilation). Vasodilation leads to increases in blood flow, oxygen transport and nutrient delivery to muscle tissue. This means increased strength and stamina, better pumps, more gains, and quicker recovery. Nitric-X is further enhanced with our Boost Blend. This blend is a powerful delivery system helping to carry Nitric-X into the bloodstream at an extended, sustained pace of up to 10 hours. The effect of Nitric-X is something you have to experience to believe.