Does donor site matter in regards to how long lasting fat grafts are?

There is little evidence that shows fat grafts survival increases/decreases dependent on area. The technique is more important. Successful fat transfer can last 10+ years with minimal need for touch ups. We use water-assisted harvesting of fat (BodyJet/AquaJet) and find it has high levels of success. See an expert. Best, Dr. Emer

There are very few studies which have truly looked into the nature of the donor sites and if this has an influence on fat survival. The technique for the harvest and preparation as well as the nature of the recipient site probably are more important factors but even than has not been standardized.

There are no reliable studies that show a difference in fat survival when taken from different areas.  Wherever the fat is taken from should be relatively the same in terms of survival, meaning 60-70% of the grafted fat should take hold over time.  I hope this helps.

The longevity of the fat graft is dependant mainly on the vascularity of the recipient bed! In other words, the best tissue for fat transfer if it is not injected in a rich vascular area, will  die in few weeks! It is why as other harbingers I have chosen to inject purified fat inside the muscles of facial expression, 18 years ago. I created the FAMI technique for predictability and longevity. There is a quote:

Thank you for posting your question. There is no study that shows fats from different areas having different survival rate. Some people tend to reabsorb more fat after fat transfer, so how long lasting fat grafts are really depend on your own body and the physician's technique. Do what you believe is right and best for yourself. There is no need to change a body part you really love. Best of luck.

Different studies on this come up with different results but overall, if there is a difference in donor sites, it is small. Best to take from areas that have fat available. 

The teaching is that some areas produce "better fat" for grafting, but in practice, I have taken fat from many areas and not noticed a significant difference. There may be a slight quality difference between fat from softer areas of your body like the abdomen and flanks and that of previously liposuctioned or more fibrotic areas (such as the upper abdomen or outer thighs), but this has not yet been proben. Taking fat from your arms for grafting should be a perfectly viable option.