I'm really uninformed about this topic, but I'll second the request for info about this!
I have Alzheimer's on three sides of my family (really banking on the fact that I take after the 4th grandmother who was sharp as a tack till 98), and while I haven't ever looked into a diagnosis of hypercorticolism, thanks to very early (in utero/neonate) trauma, my parasympathetic nervous system never learned how to clear cortisol like it should, which I'm working to remediate now.
I've been operating under the assumption that Alzheimer's is a high risk in my future, but I'd love to know more about what any experts would say I could even try to do by lifestyle change or preventative treatment!