It's simple in theory: Eat less than you need. But the problems that can arise are manifold. I don't know if there really is a maximum of calories your body c

It's simple in theory: Eat less than you need. But the problems that can arise are manifold. I don't know if there really is a maximum of calories your body can use per day, but I read the number of 65000 kcal once. This means, a "cheat day" or simply loosing control one day a week, can destroy all your progress. A calorie delta that is too high can easily lead to such losses of control, especially if you are easily stressed.h So you try to get a delta of around 500kcal a day, maybe 1000kcal if you can handle this. But how do you know what you're using a day? There are many methods to find out and they can be off more than 500kcal, so it could very well be that your actual delta is much higher or lower than you think. So you're either making really slow progress or can't keep it up for the months you'd need to.