The short answer is that it depends. Oftentimes, patients with too much fat in one area do not have enough in another. The best example is the Brazilian butt lift (BBL) where fat is taken from the abdomen and upper/lower back and then injected into the buttocks. Another example is fat injections for breast enlargement/enhancement. Its a win-win in that you take it from where you dont want it and use it where you do. If not being re-injected, the fat is labeled as medical waste and disposed of according to county and state regulations.