I sincerely suspect that this factor was vital in retaining lean muscle tissue while dropping as much body fat as possible while on the calorie restricted, low carb diet. The enzymes include acyl-COA oxidase fat and malic enzyme. Since the body had not been fed with carbs, ending a cyclical cyclical ketogenic diet furthermore imply how the 'down regulation' will be changed. Because this is essential for that body's metabolic processes.