Fat that survives the grafting process will grow with weight gain. The host source is fairly irrelevant. Of all the things to be concerned about with this procedure where the fat is harvested from is probably not one of them. There are really only two variables determine the success of cosmetic surgical procedures. The first is the individual candidacy of the patient and the second is the skill and experience of the provider. These are probably equally as important. Grafting fat is fickle, unpredictable and technically difficult. Survival of fat is highly dependent on the host tissue available to support the graft probably even more so than the actual grafting technique. Thickness of host tissue varies quickly in adjacent areas around the orbit. for this area fillers unlike fat is highly predictable, precise and far more forgiving. Best, Mats Hagstrom MD