I have been to several apts with my Mom for dementia screening. Those were some of the questions and tasks she was asked to answer and perform.
I'm only 53 and the ole brain definitely isn't what it used to be. I know the more engaged I stay with others....and with others that are younger than I am the better off I am. As an isolationist that's a challenge for sure.
My Mom was asked to take Omega 3s (the brain is largely fat), vitamin d (plus calcium for absorption) and vitamin b1. Along with her usual multi. I dunno if it helps her but I know it helps me. There are also numerous prescription meds but she didn't want to take them. And frankly I don't know if they do much more than destroy her liver and kidneys.
Old age aint pretty. Its something I think our culture needs to talk about a whole lot more. But we have such a youth centric, weird azz viewpoint toward age. Its like if we talk about it we're all going to drop dead or something.