[tombarys]

Hi, I think it is perfectly natural – as others write here :) But still, you can do a lot about this. I am 50 and I feel even better than in my forties. We have three kids, I run demanding business (book publishing in small country) and I have many other responsibilities.

My way to improving has been pretty long (10 years of trying) but ... TLDR: I started to be more physically active, including strength training, completely overhauled my circadian – sleep habits (I sleep 10x better than years before). I suggest to follow Peter Attia and read books from David Sinclair, Satchin Panda, Matthew Walker... It pays off. :) Keep going, you can improve your mental abilities again.

PS: Last year I started to learn Clojure (I am not programmer, I just love it as I feel like functional languages are like poetry:). Yes, it is not easy, but I hope my first simple and useful app will be out and public this year. Just for fun.