I find keto diet is much more satiating than low fat or "zone" type diets. I lost 80lbs this way and kept it off by doing a moderate version of it 1 meal a day of "zone" type mix and other two keto style. Obviously I eat whatever I want some days, but 90% of the time I'm good about it. My goal was always to be satiated and not to be in ketosis however. I have kept the weight for ~7 years now.