yes it is.How on earth do you "reverse" gastric bypass surgery? Is that even possible?
I believe the medical term for the "rubber band' is adjustable gastric band (brand name = "Lap Band")... and really, it's more like an inner tube, and saline can be injected into it or removed from it to adjust its tightness around the stomach.
I think some people could have a rubber band or something like that put in and it could be reversed i assume.