N02 XL, NX Mass packs...

[NewbieChris]

What do you guys think of these types of supplements. GNC has a lot of, as they describe 'hardcore training' supplement kits. Are these useful at all? Has anyone here used them? Same for N02, etc. They just promote your body to create more endo test? Has anyone used some type of derivative of this Tribulus plant?

[dna9488]

I used to work at GNC and the NO2 is great from what customers have told me. There is a new NO2 Black on the market and its overall better. You will feel the pump pre/post workout, that nite, and possible the next morning. Just do some research b4 buying it and make sure u water intake goes up when your taking any supp.

[Deacon]

I like BSN's No Explode - great pre workout supp

never tried the rest of your stack