Hello,
I weighed 230 lbs to start and they wanted me to lose 11 lbs before surgery. The nutritionist will give you a plan to do for 2 weeks before surgery. Mine consisted of protein shakes and green vegetables. I did no exercise (oops) and I still made the 11 lbs I had to lose.. Good luck It's the best thing I ever did, and the 2 weeks of dieting before, is well worth the after feeling of success!!!