Kybella is a prescription medicine used in adults to improve the appearance and profile of moderate to severe fat below the chin (submental fat), also called “double chin” . It is the commercial name for deoxycholic acid, a naturally occurring molecule in the body that aids in the breakdown and absorption of dietary fat. When injected into the fat beneath the chin, Kybella destroys fat cells, resulting in a noticeable reduction in fullness under the chin. Once destroyed, these cells can no longer store or accumulate fat, so further treatment is not expected once you reach your desired aesthetic goal. Kybella is the only FDA-approved injectable treatment that destroys fat cells in the treatment area under the chin to improve your profile. The effects of Kybella are permanent, but if a significant amount of weight is gained, some fat may come back to that area of the chin. The most common side effects of Kybella include swelling, pain, numbness, redness, and areas of hardness in the treatment area.