Creatine is one of the few muscle building supplements that I have tried that actually worked as advertised when I was competing. It had an interesting side effect for me, though: During a round of golf my forearms would get a tremendous pump when I was taking it. Having tight and pumped forearms is NOT conducive to a good short game! I'd get a case of hammer hands late in the round because of it. I don't take creatine any longer because of that psuedo-pump it gave me, but it really did work. Good luck!