The FDA opposed the widespread use of growth hormone in sports and for increasing muscle mass.

“yeah and um so Ganentech got really good at that and in fact when I went to Janentech in 1995 the chief medical officer of Ganentech was a pediatric endocrinologist an expert on short stature and and growth hormone but it's a pretty small market this is you know uncommon so Janentech decided that they uh um they would get but by this point it was being used rampantly in sports yeah and the FDA was not happy about that and and pushed really hard on on Janentech to um to control that use”