Many diet products have so many calories than regular products, some even more. EDH is the best diet 'Eat half' or edh (actually vdh) certainly helps, because you only take half the calories. But it is doubtful whether it is really the best diet. Those who do not eat enough during a meal are much more likely to eat snacks. Or you must have a strong discipline. But even then you still have no guarantee that you will stay slim. You lose weight, but the body quickly gets used to the amount of food and as soon as you just start eating again, you will arrive again.