I would only reccomend the 18in4 to you if you have tried lots of programs before and are up for the challenge of eating specific foods for four days as well as exercising. If you believe you have a wheat, dairy, or sugar allergy or sensitivity then these four days will make you feel great! And yes you will lose some weight but it would only be permanent if you are already or are ready to make permanent changes in your life - i.e. healthy eating and daily exercise.
Hope this helps. | 
