No proof either way isnt proof it wouldn’t work.. Here’s a few snippets that might interest
HGH travels through the general circulation and binds to receptor sites on nearly all cells of the body, though predominately in liver cells. Once the receptor site is occupied by a molecule of hGH, the liver cell is instructed to produce several messenger chemicals which include IGF-1, IGF-2, and others growth factors. These messengers are responsible for doing the work of hGH.
Human Growth Hormone stimulates virtually all of the various systems in your body. The hormone increases your metabolism helping to break down fat, build proteins, and create lean muscle. Human Growth Hormone is often referred to as the “fountain of youth hormone” due to it’s youth-promoting benefits.
Testosterone enhances the effect of growth hormone (GH) to increase IGF-I but exerts an anabolic effect that is independent of GH action
If hGH acts as an effector mechanism on all cells of the body, it probably could stimulate growth in the BC muscle and the corpus cavernosa/ spongiosum as well right? By the way I am not suggesting injecting either of these, just making the most of the natural fluctuations of these steriod hormones in the body that occur anyway. Anyway just some food for thought :)