Ultimate Keto Fuel This may sound awkward at first, but by zig-zaging your calorie intake, it helps to trick your body. You may start by going with a low calorie intake for a day or so. But then if you add a high calorie day into the mix, your body starts to get confused. Now that it's getting more fuel, it will start to speed up the process to compensate for this. ur bodies will try to maintain homeostasis as best as it can, so it will speed up and slow down within just a few days of intense dieting. By having some low and high calorie eating days throughout the week, you're never consistently giving your body the same amount of nutrients and fuel on a regular basis.