The great benefit of the Brazilian Butt Lift is that is uses your own body fat for the augmentation and avoids the need for implants. The fat however survives as a graft, which means that the fat has to be incorporated to the surrounding tissue. The fat then feels and acts just like fat in another parts of your body. This is why you can have such a natural feel to your butt. It also means that you will have a result that will last you for years to come after the initial fat loss.
There are several things that you can do to decrease the amount of fat that is absorbed. One is not sitting after your procedure. The pressure of sitting can injure the fat and cause the fat that has been transferred to be absorbed. The fat needs time to heal and become incorporated in your butt.
If you are a smoker, stop. Smoking also impedes the healing and incorporation of the fat that has been transferred to your buttock. Smoking causes vasoconstriction, which limits the blood flow to you newly transferred fat. The fat needs that blood supply to survive and give you the best result possible.
With all of the above recommendations patients will still lose some portion of their fat that has been transferred for their Brazilian Butt Lift. In general I do put as much fat as possible into the buttock, that it can safely handle. This will help patients achieve the best aesthetic result possible.
Please consult with your board certified plastic surgeon that performs a high volume of butt augmentations to help guide you through your procedure.