Hi there- I have had some excellent outcomes in patients who, for a few months before surgery, went on weight gain diets. Once the body accumulates a bit of fat, we are able to transfer as much as possible to the buttock, with a pleasing improvement in shape and a new proportion. The patient than loses the excess weight, but keeps the new shape (in other words, you will get smaller after you lose the weight, but the new shape and proportion of your buttock to the rest of you is maintained). Buttock implants have come a long way too- but with either procedure its important that you find a surgeon with a lot of experience in this area. Ask to see photos and talk to former patients.