Kybella, or deoxycholic acid, is a naturally occurring acid that destroys fat cells in your body and expedites their expulsion via the lymphatic system. When injected under the chin (or other areas), Kybella destroys the unwanted fat cells in the submental region. This prevents your body from accumulating fat under the chin, helping you achieve a chiseled jawline. Kybella also stimulates collagen production, which helps with loose skin in this area after fat reduction.