[Reach]

Originally Posted by Mahou

Arch has touched basis on this but there are good supplements you can buy over the counter that can help. The ones that helped me so far are....

Caffeine - gives extra boost before working out in the gym (coffee, caffeine tablets, preworkout)
Creatine monohydrate - makes the body retain water in the muscle to help build more strength and endurance
Whey protein

Anything else I ever bought was a waste of money.

You just covered the holy trinity of supplements with proven efficacy, and every other supplement sold in stores that does something is just a marked up concoction with one or all of these ingredients in it...with everything else they sell being completely worthless.