Fasting as a tool for healing

Sa
Has anyone ever fasted for healing purposes? This isn't fasting for weight loss, but rather not burdening your body with solid food to give it a break and a chance to heal itself.
If you have fasted to heal, for how long did you fast? What type of fast did you do? Did you feel better afterward? Was the fast reasonable, or did you feel like you had to cheat during it?
I'm starting small and trying to avoid solid food for just a day at a time. However I'm still drinking herbal tea, LOTS of water and also bone broth. Thoughts??