Deoxycholic Acid: What It Is, How It Works, and What to Expect
What Is Deoxycholic Acid?
Deoxycholic acid is a naturally occurring bile acid produced by the body to help break down and absorb dietary fat during digestion. In its synthetic form, deoxycholic acid is used as an injectable medication to reduce localized pockets of fat, most notably under the chin (submental fat, often called a "double chin").
When injected into fatty tissue, deoxycholic acid destroys fat cell membranes through a process called adipocytolysis. Once the fat cells are destroyed, the body naturally processes and eliminates them over the following weeks, leading to a gradual reduction in fat volume in the treated area.
FDA-Approved Use
The most well-known application of injectable deoxycholic acid is the brand-name treatment Kybella, approved by the FDA in 2015 for reducing moderate-to-severe submental fat. It was the first injectable drug of its kind approved for this purpose, offering a non-surgical alternative to liposuction or a neck lift for people bothered by fat under the chin.
How the Treatment Works
A typical deoxycholic acid treatment session involves:
Consultation – A provider evaluates the treatment area and determines candidacy.
Marking and injections – The provider marks a grid over the fat pocket and administers a series of small injections directly into the subcutaneous fat.
Recovery – Swelling, numbness, redness, and bruising are common for several days to a couple of weeks.
Multiple sessions – Most people need 2 to 4 treatment sessions, spaced at least a month apart, to achieve visible results.
Results build gradually as the body clears the destroyed fat cells, with final results often visible a few months after the last session.
Frequently Asked Questions
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Kybella is the brand name for injectable deoxycholic acid used to treat submental fat.
Deoxycholic acid is the active ingredient itself and is also being studied for other fat-reduction uses.
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Clinical trials supporting its FDA approval showed measurable reduction in submental fat for many patients, though results vary by individual and typically require multiple sessions. Our patients express satisfaction with their results and state “they wish they did it sooner”.
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Most people need between 3 and 6 sessions, spaced about a month apart, depending on the amount of fat and desired results.
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Providers typically use a numbing agent or ice before injections. Some discomfort, tightness, and swelling afterward are common but generally manageable.
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Because the treatment destroys fat cells rather than shrinking them, results are considered long-lasting. However, weight gain can still cause remaining fat cells in the area to expand.
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Most people can return to normal activities immediately, though visible swelling and bruising can last one to two weeks.
What areas can be treated with Deoxycholic Acid?
Submental fat — the fat under the chin that creates a "double chin."
Jowls —along the jawline
Bra fat / bra bulge —back, near the bra line)
Underarm —fat armpit fat
Banana roll —fat below the buttocks
Knees, Abdomen —small, stubborn pockets
