Deoxycholic acid injections are a non-surgical method used to target localized fat under the chin (also referred to as submental fat) and sometimes in the area of hereditary jowls. This substance is identical to a naturally occurring compound produced by the liver to help digest dietary fats in the intestine.
What are fat-dissolving injections?
When injected into the fat beneath the chin, deoxycholic acid works by breaking down fat cells. These cells are then gradually absorbed by the body over the following weeks.
The treatment typically requires 2 to 4 sessions, spaced 4 to 6 weeks apart, depending on the amount of fat to be treated and the goals discussed during the consultation.
The commercial name of this treatment is Belkyra, approved by Health Canada, and also known as Kybella in the United States. This mention is provided for informational purposes only, with no intent to commercially promote the product.
before
after
“Note: These photos are published for information purposes only in order to provide information on the nature of the intervention. In no way should they be considered a guarantee of results.”
Who is this treatment for?
Deoxycholic acid injections may be appropriate for individuals with localized fat deposits under the chin (double chin) or hereditary jowls.
Several factors are considered to determine if a patient is a good candidate:
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Good skin quality (firm and elastic, without significant sagging)
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A moderate amount of localized fat
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No major muscle or skin laxity
This treatment is not suitable for everyone. In some cases, neck liposuction or a neck lift may be more appropriate.
During the consultation, Dr. Léonard Bergeron, plastic surgeon, will assess your facial structure and goals to recommend the most suitable technique.
Initial evaluation and treatment planning
Before starting the treatment, Dr. Bergeron conducts a thorough clinical evaluation of the treatment area, including skin quality and fat distribution.
In some cases, ultrasound analysis may be used to visualize deeper structures.
This advanced technology, still uncommon in clinical practice in Quebec, allows for a more precise assessment in complex cases, especially when the anatomy is atypical. It enhances both treatment planning and safety.
3D photographs may also be taken before the first session to document the starting point and track progress.
A personalized treatment plan is then developed, including the estimated number of sessions, their frequency, and the expected results.
How does a fat-reduction injection session take place?
Each session is performed in-clinic by Dr. Bergeron and generally lasts less than 30 minutes.
Typical steps of the procedure:
- Preparation
The skin is thoroughly cleansed and disinfected, and the treatment areas are carefully marked based on fat distribution. - Injections
Using a very fine needle, deoxycholic acid is precisely injected. A local anesthetic is used to increase comfort. This step usually takes only a few minutes. - Ice application
Cold compresses or ice may be applied after the injections to reduce swelling and relieve mild discomfort. - Post-treatment recommendations
It is recommended to avoid intense physical activity for several hours following the procedure.
Sessions are usually spaced 4 to 6 weeks apart, and the need to continue treatment is re-evaluated at each visit.
Recovery and clinical follow-up
Significant local swelling is expected for 3 to 5 days after the treatment. This is a normal reaction and indicates the product is acting on the fat cells.
Tips to support recovery:
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Apply ice in 15–20 minute intervals
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Keep your head elevated, especially while sleeping
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Avoid intense physical activity during the first 24 hours
Residual swelling gradually subsides.
A noticeable improvement is often seen around 3 to 4 months, although final results may take up to a year to fully stabilize.
A follow-up appointment is scheduled after each session to evaluate progress and adjust the treatment plan if needed.
