Everything I would have said is already here in other comments, so I’ll just say +1. I’m 44 and had a period around 40 where I thought this was happening to me,

Everything I would have said is already here in other comments, so I’ll just say +1. I’m 44 and had a period around 40 where I thought this was happening to me, too, and I’m quite convinced it was NOT mental decline. Im doing better than ever because of just exercise in my case, though I may still investigate ADHD.