Is it possible to use donor fat, like from a family member, for a BBL if you don't have sufficient?

Unfortunately, unless you have donor fat from an identical twin, fat transfer from a donor would be unsafe and unsuccessful.  Your immune system would attack and kill the transplanted fat cells in the same process and organ transplant experiences, except organ transplant recipients take medications which many serious and dangerous side effects to minimize the immune response.

Only the fat from an identical twin can be used.  I have had very good success with thinner patients and fat transfer.  Find an expert at BBLs who performs hundreds of buttock augmentations
and who has good before and after pictures and good reviews.Kenneth Hughes, MDLos Angeles, CA