Maggie's Farm

No, but for people who try to move serious weight (meaning weights you can only move 3-8 times) two or three times/week (or do regular HIIT), creatine can be helpful to get you moving a bit more and thus stressing your muscles more than you might have the energy for otherwise. No stress, no effect. I use it, when I remember to take it. It might have a placebo effect on me too.

For real muscle magic, steroids and maybe GH. Do not touch that stuff though, friends. It is bad juju. 

Amusingly, the only other supplement the Greysteel doctor recommends is coffee. Without a cup at 4:30 in the morning, there is no way I could get my head into effort.

Here's the Greysteel doc on Creatine. Good basic energy physiology. The stuff works like a little battery.