Hmm...it's a black and white supplement. Some people love it, some people hate it. I've already posted on it in another thread. The vasodilation DOES make u look more pumped and veins poppin' out, which goes away. BUT NO's vasodilation factor does = more blood flow to muscles. Blood flows to wherever oxygen is needed more, and when ur workin' out, the blood will pump hardcore to the worked out area. Vasodilation allows easier passing of blood to ur muscle tissue during working out. As for the rest of NO-Xplode, it has CEE, a billion vitamins (over-exaggeration) taurine, caffeine, and alot of other things to increase ur state of mind when ur working out (hence why some people get headaches from it). I find it to be great, and I use it.