Fat is a very common material used as a filling substance in facial rejuvenation. The fat that we inject into facial areas comes from your own body, so there is no chance of an allergic reaction. Fat can be used in higher volumes than most other injectable materials and can be used to create a fuller, more youthful appearance by reestablishing pleasing contours. Injections of fat into the deep layers of facial tissue can soften the angular, thin appearance that often accompanies aging. The procedure is a two-step process that usually requires several treatments. The fat must be harvested from your own body, typically from the abdomen, thighs or hips. After it is extracted, it is placed in a centrifuge to separate the fat from surrounding tissues. The fat is then packed into a syringe ready to be injected.

Fat injections have a very variable life span. Much of the fat may be absorbed within six months. The fat is slowly absorbed by the body, although the amount of absorption depends on many factors and is hard to predict. Typically, more than half of the fat used in injectable treatments is absorbed within six months of the procedure, although it may last longer. Almost all patients will permanently retain some of the injected fat. Follow up treatments are usually necessary.