Since you asked. I think it not very practical, i read into it when i first heard and thought it was a great idea. That was until i found out the amount of injections it would take and if not done properly, your arms will not look right. ALso, will the increase in arm size match and arm strength be the same? Or will you have large arms and not be any stronger than before the injections? Not for me, Ill do it the old hard fashioned way.