If you do it right, i think you will gain at least 10 lbs of solid tissue, I'm on week 4 and I have already gained 20 lbs. I don't care what everybody says, i'm not lying and yes it is 100 % lean tissue , my bodyfat is actually down, But i am also on insulin and Tren and I haven't taken anything at all in a year so, those could be some factors, but I think if you decide to get on it with some 'slin and some kind of fast acting androgen you'll see good results