KYTHERA Biopharmaceuticals, Inc. (Nasdaq:KYTH) announced today that the U.S. Food and Drug Administration (FDA) has approvedKYBELLA™, also known as ATX-101, "for improvement in the appearance of moderate to severe convexity or fullness associated with submental fat in adults." KYBELLA™ is the first and only approved non-surgical treatment for reduction of submental fullness, a common yet under-treated aesthetic condition.