Nitric oxide is the newest thing that everyone is talking about. Nitric oxide is made of the amino acid L-arginine which is broken down. Nitric oxide has a vast array of benefits for the body however one that always stands out is that it helps with blood regulation. It helps even with penile dysfunction and Viagra, which is used in these cases, includes nitric oxide.
I can say from a personal experience that it does have that pump feeling. My friend that is on it showed me his results from taking nitric oxide. In less than a month his biceps where almost rock hard, due to the pump of the blood in his system. He also has more endurance while in the gym, almost like creatine. Although there is little strength gains, there are gains in lean body mass.
If you want more info, like other things that Nitric Oxide contributes too feel free to ask. THere are a pleathora of things it does to the body.
I am currently on BSN nitrix. I am getting slightly bigger gains and my pumps are slightly bigger. I have been on it for about a week now and I have noticed one very important thing.........FOLLOW THE INSTRUCTIONS PERFECTLY. The instrucktions are carefully calculated and it is very important to accuratly follow them.