I'm back on the train myself. Pre-COVID, I had lost 37 lbs in 6 months, while adding approximately 15 lbs of muscle. Since then, I've gone back to exactly who I was before that d/t various things like injury, time, and convenience to the gym since we moved way out of the city. I never fasted, and I won't because I like food (not junk, I just eat a lot). When I had the prior success, I just limited my calories, which is a pain for multiple reasons. For 2 of the 6 months, I also ate zero processed foods. It's amazing how the inflammation disappears from your body when you don't eat things that contain ingredients that you can't pronounce. For reference, I am now 52, so I was previously 48 when I achieved the previous transformation.