Basically bro they vasodilator you so you can push more nutrient rich blood into the muscle, through this transportation the products other ingredients like creatine, BCAA, EAA, Waxy Maize, caffeine, etc..... are pushed into the muscle as well as allowing you to achieve a better pump, better endurance, buffer lactic acid and and train more intensely. CTD is in the process of formulating a pre-workout different from the others. But for now Superpump, Supercharge, No-explode, and the new DARK RAGE by MHP is real good.. Taste like death though, but the pump is real good!