Diets do not lead to permanent weight loss for the vast majority of people. Not even if you call them “a whole new way of eating.” Or a “lifestyle change.” If your lifestyle change involves putting restrictions on your food intake, you will almost certainly be fat again in five years  Because they FUCKING STOP DOING IT BEFORE 5 YEARS. Kind of left out that important point.  Doesn't matter what you call it, just have to keep it up.