^exactly +1 The best part about it, there are no known side effects and it doesn't mess with any hormones at all.

You do have to keep going, the no2 doesnt do all of the work, its YOU. Eat healthy and DO NOT eat protein a good hour before and an hour after you take it, it will deminish the effects.

Remember to weight lift with your legs, I was reading that if you get your legs built up, then it will be much easier to get your upper body built.