Clen
Clen is really only anabolic in animals because they have what is called alpha 3 receptors. These receptors are found in abundance in most animals and produces anabolic growth while the Alpha 2 and beta2+3 recptors create fat loss by speeding up your brown fat cells. Basically humans have so little of A3's that we don't get anabolic effects from clen. Some people have reported it though, But I would have to think only for the first three days, untill down regulation kicked in, and they probably had a high amount of A3 receptors.
P.S. if you take ketafin with it, it will make you grow. It is also dose dependant, but I wouldn't take to much cause it is too hard on the heart at high dosages.