Injectable fillers will typically only last 6 months to 2 years depending on the type used, however fat harvested from the body and transplanted into the face is essentially permanent. Not all of the fat cells will survive the procedure, however the ones that do survive are programmed to think they are still located in their previous location. When fat is taken from the abdomen or flanks, these cells are prone to resisting shrinkage, which means that will remain the case when transferred to the face. Unlike facial fat, which is susceptible to depletion.
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