HA fillers are natural fillers that have been used safely and effectively all over the face and neck for nonsurgical filling and augmentation, and its use has the additional tremendous advantages of engendering little to no significant post-treatment downtime, as well as that of being able to be dissolved farily easily with a natural enzyme, hyaluronidase--should the need ever arise. Now, fat injections, also employ a natural substance, one's own fat, which of course leads one to be enticed by the idea of its safety and its permanence. Well, unfortunately, the story is a bit more complicated for this relatively expensive, two-step minimally invasive approach. First of all, since fat is a bulky substance, it requires the use of large bore cannulas to withdraw it from the buttocks, belly or thighs--the usual donor sites. and it also requires large bore cannulas to reinject the processed fat back into the recipient sites. Both miminally invasive procedures then are followed by a real period of downtime. Unfortunately, once the donor fat is separated from its original blood supply, much of it does not take in the recipient site--meaning that not uncommonly the results of treatment do not last much longer (or even any longer) than that achieved with off-the-shelf robust HA fillers. Finally, that fat that does survive retains the characteristics of the area from which it was drawn--meaning that when belly fat eventually begins to show midriff bulge, it has the capacity to show up as bulging in the donor areas of the face, as well. It is for this reason that I stopped fat injections many years ago. Hope this helps. You would be wise to consult with a board certified cosmetic dermatologist. Best of luck.
