Human fat, taken from your own body, can also be used as an injectable filler. Prior to injection, fat must be "harvested" or extracted from your tummy, thighs or buttocks using liposuction techniques. For this reason, fat injections are a more involved procedure than injections with pharmaceutical fillers. Once injected into soft tissue, the fat must develop a blood supply to "take" or survive and provide a long term correction, although some of the fat cells with be naturally absorbed. The remaining fat and the enhancement achieved is considered permanent, although it will diminish naturally with age. Extracted fat can also be frozen for your own future treatment. However, the results from frozen fat is not as favorable as fat that is injected in the same treatment session during which it is harvested.