Axon worked pretty well for me, then it kind of lost it's effects, started taking it with bioperine, that helped it, and now it just doesn't do anything for me. Looking for something else. I really did love Axon. Long lasting, no crash, no jitters. It's a shame this happened. So what do you guys use? I'm looking for just pure energy. I have my own premade preworkout. hcl, l-citrulline, kre alkalyn.