Think Nutri-Meds adrenal cortex is a better choice. It's 250mg ACE per cap, 120 caps per bottle. That's 10x more ACE than you get from Thorne, for around 4x the price. If you don't tolerate 250mg, you can obviously open the cap and take less.
With severe adrenal fatigue, I take 2 caps 3x a day. With the Thorne, I'd have to take 10 caps 3x a day to be the equivalent - that would bankrupt me fast!
I've never tried the Thorne, so can't attest to its potency. I can vouch for the Nutri-Meds, though - it's a good ACE product. My TSH went from 18 for over a year to below 1 almost overnight as soon as I started taking the Nutri-Meds. And at that time I was only taking 2 or 3 caps a day.
It's always a good idea to start out slowly, so whatever product you get, take it easy at first to assess your reactions.