You guys will learn when you actually start practicing medicine that none of these supplements actually work as advertised, which is why these companies take the "supplement" route (with it's lower efficacy requirements) rather than go through the FDA approval process. It won't make you stronger, but thanks to caffeine and other additives, it makes you feel jittery so you work up a sweat, and the rest is placebo. Supplements dont work. If they worked, they would be worth the investment to get them FDA approved. Yet all supplements have side effects, and so yes even tHough you might not improve your lift or your focus, you certainly might stroke out or destroy your liver. As future physicians, you guys are going to need to be the safeguards against the frauds that get played on foolish consumers by supplement companies, not one of the fellow rubes.