I'm an advocate of a practice called fasting for a vast array of health benefits, of which there are many!
I am sure that I saw that one that I don't intentionally seek is the ability to help with memory and early stages of the condition.
Please double check! Let me link you an interview with Dr Jason Fung who outlines all the benefits, including memory, and why.
I hope this can help! This is perhaps one of my favorite interviews!

Luppers