also: I promise this isn’t advice, but I wrote up a couple posts a few years ago about a fasting mimicking diet protocol I use that gives me an insulin sensitivity boost after I do it. You might find these posts interesting or helpful!
https://icanthascheezburger.com/wordpress/2020/07/fasting-without-fasting/
https://icanthascheezburger.com/wordpress/2020/08/omg-diy-fmd/
I’ve also been planning to write up a new post with updates on how I've aimed to make this a sustainable part of my life.
It's not for everyone but I have good outcomes!