Kybella is the only FDA-approved injectable that permanently destroys fat cells under the chin. It’s a targeted, non-surgical solution for a “double chin” — and because the fat cells are gone for good, the results don’t come back as long as you maintain a stable weight.
How Kybella works
Kybella is synthetic deoxycholic acid — a molecule your body already produces to help break down dietary fat. When injected directly into the submental fat (the fat pocket beneath your chin), it dissolves the fat cell membranes. Your body then clears the destroyed cells naturally over the following weeks via the lymphatic system.
Because the fat cells are physically destroyed (not just shrunken), the results are permanent at the treated area, as long as you don’t gain significant weight afterward.
What to expect during treatment
A session is fast — 15 to 20 minutes:
- Provider marks injection grid on the under-chin fat (typically 20–50 small injections per session)
- Numbing or ice is applied
- Kybella is injected in a precise grid pattern across the fat pocket
- You leave with a cold pack and instructions for the next several days
The swelling is real. Plan for 3–7 days of significant under-chin swelling — sometimes described as a “bullfrog” appearance. Bruising and tenderness are also common. Most people schedule treatment when they can stay low-key for a week (working from home is ideal).
Results and timeline
Kybella is a multi-session, gradual treatment:
- Days 1–7: Significant swelling, bruising, tenderness
- Weeks 2–6: Swelling resolves, early reduction visible
- Weeks 4–6: Schedule next session
- After full series (2–4 sessions): Final result — typically 30–50% reduction in under-chin fat per session
Total treatment is 2–4 sessions for most people, sometimes up to 6 for severe fullness.
Is Kybella right for you?
Strong candidates have:
- Mild to moderate fullness under the chin (a “double chin”)
- Good skin elasticity — your skin will retract after the fat is removed
- No significant excess skin — Kybella won’t tighten loose skin
- Tolerance for visible recovery — the swelling is real and obvious
- Stable weight — significant weight gain after treatment can stretch remaining fat cells
It’s not the right call for:
- Severe submental fullness (chin liposuction may be more efficient)
- Significant loose neck skin (consider neck lift or skin tightening + fat reduction combo)
- People who can’t take 3–7 days of visible swelling between sessions
Risks and side effects
Common (essentially universal): swelling, bruising, tenderness, numbness, redness. All resolve within 1–2 weeks per session.
Less common but important: nerve injury (especially the marginal mandibular nerve, which can cause a temporary asymmetric smile) and trouble swallowing. These are rare and almost always temporary, but they’re why provider expertise matters a lot — proper injection placement avoids these complications.
What affects the cost
- Number of sessions. Most people need 2–4; sometimes 6. Total budget typically $1,500–$6,000+.
- Amount of Kybella per session. Larger fat pockets need more vials.
- Provider expertise. Choose someone who does Kybella regularly — the injection placement is precise to avoid nerves.
- City + clinic. Major metros price at the upper range.
Many clinics offer Kybella package discounts for committing to the full series. If you’re confident in your candidate status after consultation, packaging saves 10–20%.
Browse Kybella providers near you on ClinicCompass to compare local pricing and book a consultation.