Jan 27, 2011 9:15 PM GMT
I've been reading alot about preworkout supplements and it seems stuff that help to increase pump are effective. The problem is that most have N.O. and /or caffeine. The only NO product I've taken is Xpand Xtreme Pump - no caffeine version. I found NO gives me upset stomach if taken too close after eating and it gives me weird tingles. Caffeine would keep me up at night so I don't want that. Are there other options? Thanks!