How long does hand fat transfer last?

Your question is a good one and the reality is no one nows for sure as it has never been studied long-term. Short-term results (6 months to a year) shows good fat retention stability in the hands but what happens five or ten years later as one ages can not be said with certainty. In theory, fat transfer (after it has settled into the final retained volume) should be permanent but few fat areas in the body are completely stable throughout one's lifetime.

Theoretically
it lasts forever as it is a graft and if the transferred tissue survives it
should not dissipate. I recommend you seek out a board certified plastic
surgeon so that they may examine you and give you a proper assessment.Best
of luck to you

Fat transfer, will last long time. Some of the fat will absorb, the remaining fat will last.There are many experienced plastic surgeons in Boston who perform fat transfer.