I used to be a much larger mammal and lost a lot of weight (100+) through fasting and diet change. Longest I did was a 14 day fast with zero-calorie electrolyt

I used to be a much larger mammal and lost a lot of weight (100+) through fasting and diet change. Longest I did was a 14 day fast with zero-calorie electrolytes, black coffee, and sparkling water. You get pretty low energy but the hunger just kinda subsides into background noise. I still try to do a 5 day 'reset' fast every quarter or if I hit 200. Diet change is really the most important factor but fasting is a nice tool to have because at least for me it's relatively easy and provides quick results compared to trying to maintain a sustained calorie deficit for multiple weeks. IF is, of course, likely safer so definitely start there if you're new to the game.