Kybella (lypolytic) - $460 per vial double chin fat reduction. Usually requires 2-4 treatments depending on the amount of submental adipose tissue spaced 3-4 weeks apart. Kybella is the first FDA-approved injectable for reducing "sub-mental fullness" – otherwise known as a double chin. The under-chin fat may be causing you to feel self-conscious, unattractive or develop low self-esteem. Kybella is an effective way to reduce it, since it is a synthetically created version of a naturally occurring molecule in your body (deoxycholic acid).