There is a lot of literature on how your body responds to various types of fasts. I’m not recommending anything here but I try to do a 120-hr fast once a year. Intention is to trigger autophagy. And post 72-hrs your mind starts doing some pretty cool stuff.

Throughout the year I’ll do 72-hr fasts to reestablish discipline.

I’m no “expert” by any means but I enjoy the experience of fasting.