It's a familiar feeling for lots of fit guys: Walk into any supplement store, and you're faced with an overwhelming barrage of pills, canisters, powders, and potions promising to tranform you into Superman (or at least The Flash).

But don't sweat it, champ: While there are always going to be plenty of options, the average dude who's eating right and working out really only needs to focus on a few key supplements. Here are five to focus on.