one week back i bought NO2 stuff after reading so much interesting stuff. but two days back i got this sore throat and am not feeling comfortable. I thought its something else.
But after reading this post I really got scared. I am going to return this product.
Check this posting....
http://forum.bodybuilding.com/showthread.php?t=762994
I would suggest for anyone just use protein powder, creating, and mulitvitamin.
All other products are just bogus and you may develop negative effects.
I asked many bodybuilder who just go to gym as a part of exercise and still developed good muscles. These three products are enough for good body.