no2 products are amazing. i have used no-xlode, nano vaper, nano x9, no2, no2 black, and altered state. they work because they flood your blood with extra l-arginine, which is an amino acid that improves blood flow. so when you take a good amount, usually around 3-5 grams, you get more vascularity and a better muscle pump. when you have more blood flowing into your muscles, you are stronger because there is more blood in your muscles. and if your getting a no2 product for $30, it probably isn’t going to work. most premium products cost around $50 for powder, and $70-$125 for pills. it is expensive, but it is a great workout tool. it is the best supplement breakthrough since creatine.