Nitrous Oxide is used to supercharge racing engines, and a similar compound, Nitric Oxide, can maximize your performance in workouts. Dymatize Nutrition Xpand Nitric Oxide Reactor boosts and compliments the effects of this powerful compound. Nitric Oxide is naturally produced by our bodies, regulating vital processes in our hearts, brains and immune systems. It is immensely valuable in workouts, because of an effect called vasodilation, which results in increased blood flow to muscles. This incredible blend of workout enhancers will help speed up muscle recovery and help you perform at your absolute peak.