Yea right!!!!!! Lee Priest doesn't use this shit, whatever supplements the company sends him he probably feeds it to his dog or fish.
If you want to gain lean mass, especially if your the type that puts on fat very easily, sticking to low GI foods, and avoiding foods like bread or carb powders(except post workout) while still keeping calories high and protein high, and a moderate amount of fat, it should help.
I really think that even some low GI foods are awful. I'm trying to get myself away from wheat bread. Especially without supplements I think the only foods that are cool are oats,vegetables,peanut butter, and stuff like that, but bread is just horrible, I've been eating this shit thinking its good because it has 3 grams of fiber per slice, but think again.