Core ZAP is an energy product that promises "extreme" energy as well as focus, strength and fat loss. While I haven't noticed any significant fat loss, the energy it provides is pretty extreme. The blend of Epimedium, Geranium, Sulbutiamine, L-Tyrosine and Caffeine got me pumped through my entire workout and lasted nearly an hour beyond it as well. I'm not sure if it was intended or not, but Zap also made me quite hungry. I like Zap because it is in pill form, which makes it pretty convenient. And unlike other caffeine products, I did not feel jittery, just energized and alert.