I would say that nitric oxide products do absolutely nothing. I have tried a few, including some samples of Pump-Tech, and got nothing. Since the price is so steep, you'd get twice the results directing your funds into protein, creatine, and a carbohydrate for postworkout.
The best PUMP I've ever gotten was when I combined 1 serving of Vitargo with 4 grams of CEE.. WHOA!!
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Make sure you look at the names of each forum. This is a supplement question, which should be placed in the supplement forum, not off topic.