A common approach for the enhancement of the derriere is based on autologous fat transfer, widely known these days as Brazilian Butt Lift.
Regarding fat injections that are advertised with these suggestive 3 words, in the following link you will find an overview about this procedure: Brazilian Butt Lift.
The technique we successfully apply in our practice is Bioplasty by PMMA aka Brazilian Butt Lift Without Surgery which uses a biocompatible substance based on microspheres of PMMA. This dermal filler has been granted approval by the Brazilian FDA under the brand Linnea Safe.
Bioplasty has gained its reputation throughout many years of research, practice, improvements and depuration of the technique being its efficacy indisputable, particularly on slim people whose fat is scarce to begin with.