Look into the healing powers of intermittent fasting / time restricted eating. It seems unrelated, but if you read "Why we get sick" you'll learn it's ALLL about insulin and food quality (for everything from leaky gut to Alzheimers!).

IMO the first book to read to set a framework is "Fast, feast, repeat" by Gin Stephens. She explains (in simple easy to read language) why to fast (or do time restricted eating) and HOW to fast.

She bases all of her writing on other's research and the findings of Dr. Jason Fung -- who's has AMAZING results and research on fasting and disease... but can be a bit convoluted in his explanations of WHAT to do to solve your issues.

Nevertheless ... I recommend listening to Dr. Jason Fung's podcast. Reading Gin Stephan's Fast, Feast, Repeat, and Benjamin Bickman's Why we get sick. All soooooooo eye opening, and instructional as to how to elevate / cure IBS and other gastro-intestinal issues as well as everything from type 2 Diabetes and Depression to preventing Alzehiemers. Who knew they were alllll related?!!!

They'll explain the role of insulin and how you might be spiking your insulin (and thus not giving your digestive tract time to rest) without even realizing it, and how important digestive rest is to give your body time to clean up "junky" cells and other issues by use of Autophagy.

Once you start down this health rabbit hole, you'll realize, it's the real thing!
I recommend:

Gin Stephens' book "Fast, Feast, Repeat" and her podcast "intermittent fasting stories"

Canadian Dr. Jason Fung's' you tube videos (or if you're really sciency his booksDiabetes Code and Cancer Code)... and his co-aministrators' podcast "The fasting Method"

Researcher Tim Spector's YouTube talks about gut health

Benjamin Bikman's book "why we get sick"

These will blow your mind, but also give you an understanding as to how to heal your digestive tract issues and health overall.

They've really helped me.
Good luck!