NO2 is a joke....it gives you a short term answer.....it dilates your blood vessels so you (muscles) become engorged with blood.....if you excercise hard, the exact same thing will happen. Doesn't really give you any extra strength or results.....now if you buy the kind that is mixed with creatine, than you get the benefits of the creatine....but really......would be more beneficial to just take creatine on its own...
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