Originally Posted by Mimetic
There is truth in what this guy says.
Actors don't do roids (as far as I know, could very well be wrong!) for a number of reasons, they can cause pimples, skull growth, hair loss and a number of other things, which means actors simply will not use them.
Don't forget that these guys have professional trainers, are dosed up to the eyeballs on supplements, such as protein, creatine, l-glutamine, nitric-oxide (pre-workout), you name it.
The legal supplements you mentioned have a minimal effect if any. Don't let the millions supplement companies spend on advertising lead you to believe otherwise. None of them approach the type of muscle growth you get while on steroids. Actors definitely have used steroid and still do. Mickey Rourke took them for The Wrestler. Sylvester Stallone was caught with HGH. IMO, it's no different than actresses getting plastic surgery. It's their bodies, let them do what they want with it.
As far as pro bodybuilders and supplements go, I recommend you see the documentary Bigger, Stronger, Faster.