The answer to this question depends on what is being done and where. In the state of Florida, patient safety regulations mandate that in an outpatient setting no more than 4 liters of fat can be removed at one time. However, if done on an inpatient basis (overnight hospital stay) more can be removed although most plastic surgeons wouldn't recommend doing more than 5-6 liters because there can be drastic shifts in body fluids if much more than that is done. In Florida, if liposuction is combined with any other type of surgery (e.g. breast aug, tummy tuck, etc) only 1 liter can be removed at the same time. It is very important that you are on a healthy diet of lean protein, veggies, some fruits and a regular exercise program with strength training to ensure that you are in the best possible shape and as close as you can get to a healthier body weight/safe BMI to prevent complications and to get the most optimal results. Please make sure that you consult with board certified/eligible plastic surgeons with experience in body contouring surgery. Good luck!