I got friends who are big into fitness and biohacking and all that. What I can say is that there's a really fine line between using HGH therapeutically and using HGH where it can cause adverse issues, like some of what you mentioned with enlarged glands or enlarged organs, including the prostate which can be really dangerous for men, but so can an enlarged heart, or any organ.
There's tons of literature out there but the thing is, modern medicine isnt designed for people to be using HGH in the first place. Most all HGH is synthetic these days and can lead to a host of other issues like cancer for one.
But yeah, to boil it down to the original point.. It's all about dosage and if you cannot find Pharma HGH (basically sht you can only get prescribed), don't bother even taking UGL (Underground Lab) created HGH. Why? you're probably getting compounds that mimick HGH but are not HGH, but other research chemicals that can cause a host of other problems that we ar enot even aware of due to the infancy of such chemicals. Not to mention UGL's don't have the best practices in creating hgh and other hormone/steroid compounds, so you are getting stuff that can be contaminated and not properly synthesized or with bad agents to dilute or cut it with.