Fasting?

I hear a lot about fasting as a way to trigger some autophagy and help heal. I have done 3 days Of 17 hour fasts this month and want to do a full 24. I guess One of the things making it hard besides that i have a physical job and fast metabolism is that even tho im 5 months post kratom im still a dopamine feind addict and those spikes of snacking or even just drinking milk in my coffee are hard To resist. How you all You other addicts do it ? Also how to do you manage the hunger Pains? Also do you still excercise those days? Thx!!