Kybella is a nonsurgical and non-invasive way to remove fat that causes the double chin. It is the first FDA-approved injectable treatment that contours and improves the appearance of submental fullness, sometimes referred to as “double chin”.* Kybella is a nonsurgical and noninvasive way to remove fat that causes the double chin. Deoxycholic acid, Kybella’s active ingredient, a naturally-occurring molecule in the body that aids in the breakdown and absorption of fats. Deoxycholic acid works by destroying fat cells where it is injected into the body. With the help of Kybella, a considerable amount of fat can disappear from your chin. You can have a slimmer, healthier, more youthful appearance.