So...you want to be able to lift all of the things at the gym, or run like you've never run before? Without any crazy substances? The Rivalus brand is great for that. Military-grade athlete-approved products, and Powder Burn is one of their caffeinated pre workout supplements.

From the website:
Built upon the foundation of cutting edge research and potent new ingredients, POWDER BURN provides energy, mental focus and stamina without the dangers, health concerns or failed drug screenings as POWDER BURN is built with no banned substances as per the United States or Canadian Departments of Defence.

The ingredients are also easy to pronounce - tiger nut powder, ginseng, beta alanine, all to help with your mental focus and stamina.

I wouldnt recommend taking on an empty stomach or right before bed as it can take some time to cycle the energy out of your system. I would use this for the recommended 8-week period (even on non-training days) and then cycle off for awhile to help with tolerance.

The only con about this are the flavours. This product tastes absolutely terrible in both lemon lime and fruit punch. But it gets the job done.

45 servings in a container - and it's often on sale at GNC for $38.99.