First of all, find a seminar for weight loss. They will explain everything about the surgery and the diet that you must follow. Most insurance companies want you to be on a doctor approved, monitored diet for 6 months. My doctor put me on a 1200 calorie diet but I didn't lose as much as I should have. I went back to the doctor's office every month. Then I went to the weight center. I went to a psych appointment, had a colonoscopy, had a physical from another doctor, got blood tests, 3 ekg's and a edg, started my diet and protein shakes. I really don't know about a weight limit but I believe there is an age limit. I would suggest cutting down on food, sodas, sweets, etc. Good Luck on your journey to a new life.