I used NOX2 and got good pumps, then used NITRIX...good pumps as well and f-ing hard on's like a 16 yr old boy all the time...it actually concerned me, because it was happening all the time...very viagra like for somebody that honestly doesn't really need that...
The key is having it in you all the time...that is why NO2 works so good for some people...time release....If you look at NITRIX it suggests 3 tabs (4 if you are over 200lbs) 3 times a day....I don't know....like 2ncourage explained taking on an empty stomach is also another big factor...especially when I took the NOX2 on an empty stomach in the morning...wow, I would get the sickest muscle pumps...but otherwise I can't say if NOX2 was really that good....the results seemed short termed for me on both....I didn't weigh myself or anything, just going by the way I felt.
honestly, I personally would choose V12 by San over any NO2 product....twice a day (1 of those times before hitting the gym), I love that stuff...
also, there is some literature out there regarding the negativites of taking NO2 products on the body...haven't had the time to search for these things, but have seen posts on this subject on many message boards lately.....