do a search. there was a lot of posts on myostatin binders. a bunch of good posts i believe. However, since ur lazy, like me ill give u my 2 cents. I dont believe in what they say for a couple reasons.
1.) Muscle cells stop dividing at a young age. Like preteens or earlier. If myostatin could be inhibited so new cells could develop there would be a hell-uv-a-lot news on it for the simple fact that it would have an invaluable use in the medical field. Also, you would probably see a lot of pissed off pharmaceutical companies too.
2.) I havent heard too many great things about it so far so it leads me to believe that the benefits, if any at all, arent worth the money.
Sorry to say this again, but if new muscle growth, through replication, not hypertrophy, was possible with this stuff, then there would be a lot of media. Not too mention im sure some pharmaceutical companies would kill the makers before it got to the market cause they are evil that way.
Ross