For the record, gents.........GH alone, no matter what the brand, does NOT cause skeletal muscle growth. This was well established in studies by Yarasheski, et. al. years ago. Humatrope, Serostim, Saizen.........doesn't matter.
However, exoGH along with sufficient endo or exo IGF-1, testosterone and insulin and RESISTANCE TRAINING (not too many aids people lift weights)will cause one to gain lean body mass including skeletal muscle tissue.
J.A. saw better results with humatrope because he used it with gear, as he said.
Again, all synthetic human growth hormone is the same. The only way humatrope would yield better results is if a higher or more concentrated dose was used........or, if the Serostim was fake. As DrJMW points out, this has been a big problem in the past with Serostim. (Serono now has eliminated the old system of distribution by cutting out the middleman and selling direct to pharmacies, so it should not be a problem in the future.)
ExoGH is used for AIDS patients primarily as a boost for the immune system (aquired immune deficiency=AIDS), not as a weight gainer. They get A-bombs for gross weight loss.
celica, Saizen is made by the same company, Serono, that makes Serostim and is identical except in concentration.