KYBELLA is both a prescription medicine and an FDA-approved injectable treatment used to reduce submental fullness or the pocket of excess fat that sits beneath the chin. The active ingredient in KYBELLA is the synthetic version of deoxycholic acid. Deoxycholic acid can already be found in its natural form inside your body, where it helps your digestive system break down and absorb the fats in your diet. When this molecule is injected into the area beneath your chin, it erases the fat cells so they can no longer store or accumulate fat. Results include a substantial reduction in chin fullness, as well as an improved chin profile.