Desensitization of your testicles to natural and synthetic LH. I would definitely try Testosterone at HRT levels before doing this.[/quote]
Perhaps the point is, that if you take HCG at levels that stimulate the testes to the same levels that LH in a normal younger man does, then the testes and their receptors are not been overloaded. The 250iu SQ EOD dose was shown to do that. So one might safely assume that that is a safe, prudent and effective dose.
Note that that dose is more than the often prescribed 250iu twice a week to accompany TRT/HRT testosterone. For me, that did not work well, but the 250iu EOD made a big improvement.
Some of the dosing that I see for PCT is a huge amount and might be the last thing that you would want to do if properly understood. Part of the problem is that most HCG available as gear is in ampules that encourage large doses.
I was quite impressed by reading, AR I think, that most PCT levels of HCG could be harmful and that one might be better off using the lower amounts all through the cycle so the testes are never shut down.
As for HCG shutting down the HPTA, the end effect is no LH release, same results from taking T. So no difference in that regard. But adding down regulation of the LH receptors in the testes would really be a world of hurt.
So for a guy with good testes and insufficient LH production, HCG alone might be a very good therapy. Might not get one to high-normal TRT objectives, but still might be a very valuable alternative and therapy. Perhaps with some anastrozole to reduce E competition for T receptors.