That's what they wrote, but as I already said many times, you can't isolate the adrenals and expect no feedback on the endocrine system. If the adrenals gets shut down (what someone today calls improperly "adrenal fatigue") both sex hormones and thyroid will slow down.
You need to stay on a dose for 8 to 12 weeks at least in the beginning to reach homeostasis. Vast majority of people on TRT fail because they are impatient and keep moving thing around. They will never get dialed in.
HCG is problematic, but if you want to run it, you need to get dialed in on testosterone only first and then you can introduce it. You don't need HCG to backfill the pathways, it's way easier just using bio-identical hormones.
Some cookie cutter American clinics promote HCG becaue they make money out of it.
RU58841 doesn't gets transformed into cortexolone, a corticosteroid, so there can't be an adrenals shutdown. They are different compounds.
I've already explained why in theory a big dose of CB will outnumber all androgens at the receptor. The binding affinity is for the AR, which means all the androgens, not only testosterone.
Same mechanism with CPA and bicalutamide just to name 2.