Calorie restriction and intentionally stopping eating before satiety are unsustainable long-term strategies for mammals.

“unless you get to that sweet spot of getting adequate fat and protein and keeping your insulin level low enough so that you can access your stored fat you're going to fail either not going to lose weight at all or you're going to lose weight for a few weeks or a few months then you're going to stall because it is unsustainable to starve a mammal long term and that's what you're ultimately doing with calorie restriction with with stopping eating before you're full you're starving yourself and that is that is by definition unsustainable”