There is no question that the increase in the size of bodybuilders of today versus those of the 70's and early 80's is because of the use of HGH and insulin. The Mr. O of that era wouldn't even qualify to hit the stage these days. Used for the right reasons and in the right way, they will let you grow way beyond what your genetic limitations would dictate.

I am saying that is one legitimate use. Anti-aging is another legitimate use. I am not sure that I would say fat burning is a legitimate use. There are a million and one other ways to combat fat ... safer, cheaper, and faster.