We highly recommend that you do a 3 week Retrain (Maintenance) Phase before going back to normal eating or before going into another round of Reduce.The Retrain Phase works to retrain the hypothalamus, which is that little piece of the brain that acts like a thermostat for the body. It controls the body's normal weight, metabolic rate and hunger level, among other functions. The Retrain Phase gives the brain and body a chance to reset and rest after the hard work of the Reduce Phase. Those who adhere to the Retrain Phase have the very best chance of maintaining their hard-earned weight loss success.