I don't know if Opifast is offered anywhere else, but it was a few years offered through Kaiser. You are limited to the length of time you can do the program. Its works, as long as you are willing to follow the usual diet instructions - exercise - and while on the program, attend classes to learn how to change your previous eating habits. I did the program, lost weight, but not as much as others who were also on the program. Stopped, gained the weight back and have since been banded, which has been a successful tool in assisting me to keep the weight off. Prior to being banded I did try to go back on Optifast, however, that was far too hard.