Once again, how does HC work in the body?

[Guest guest]

Been trying to get this but I still haven't fully:

When I start taking HC, and go up to a dose of let's say 20-25 mg daily.. What happens to my adrenal glands? Well, I know that ACTH is going down.BUT _is the GOAL_ to shut down ACTH completely, to give the adrenals the Proper rest they need? Or should we never, ever shut down ACTH completely, in fear of loosing the adrenal glands own production of cortisol forever?While we're on HC, we cannot test it. The blood, urine and saliva sample results get skewed. But testing serum ACTH should work, right? Where should ACTH be in serum while taking an optimal dose of HC?I am currently taking 27.5 mg HC daily. I went up 2 days ago. My specialist tells me that I should take more to tolerate T3 better, HC will be the "Backup" securing T3, in her words.I have no idea what so ever how much HC I need. My temps are stable. They were stable when taking 20 mg HC too. So what should

I do, take more HC to make taking T3 safer for me? (My specialist is worried about the arrhythmias I've been getting since starting with T3) Or take less HC until my temps become unstable? - They were never really unstable in the first place. Let's say my temps are stable at 7.5 mg HC. Just an example. How can adrenals rest properly when only taking 7.5 mg HC? And taking higher doses of T3 cannot be "safe" when taking such a low amount of HC? Again, just an example.