I have really know idea, the Dr. said this was suppose to be better, actually maybe it is, I have had no problems, vomiting, or anything and he said it is suppose to be a little easier to lose. I am sorry, I was so anxious they could have put my husbands belt around me and I would have said okay! I really didn't get details. Good luck I am sure they are all using what is called the "new band" whatever that is by now. | 