Again anecdotally. I'm mid 50's, always been fit with a healthy diet and BMI range, but the weight had started to build up of late. I tried informally exercisin

Again anecdotally. I'm mid 50's, always been fit with a healthy diet and BMI range, but the weight had started to build up of late. I tried informally exercising more and eating/drinking less, with no visible results. Six weeks back I switched to a weekday 18 hour fast, 6 hour eating window (lunch ~2pm, finish dinner before 8), no alcohol on weekdays. It was hitting 170 that triggered me to try the change. This morning I was 158 with 2% lower body fat. For me I think the fasting window just gives me an easy to follow schedule without having to make all those tiny little decisions. Once you get used to it, having your body tell you it's hungry gets easy to ignore (plus a 2pm lunch reduces the temptation for a mid afternoon snack). I don't feel any different TBH! YMMV.