Kybella: The Injectable That Permanently Dissolves a Double Chin

Kybella: The Injectable That Permanently Dissolves a Double Chin

A double chin can be stubborn in a way that feels unfair — it often has little to do with your weight, and no amount of dieting or “chin exercises” reliably melts it. Kybella offers a different route: a series of small injections that actually destroy the fat cells under your chin, with no surgery and no liposuction. And because those fat cells are gone for good, the reduction is permanent. Here’s the plain-language guide — backed by the actual clinical-trial evidence.

Kybella is deoxycholic acid — a molecule your own body already makes to help break down dietary fat. In purified, FDA-approved injectable form (studied in the trials as ATX-101), it’s used to reduce the pocket of fat beneath the chin, known medically as submental fat.¹ ² Because it’s a naturally occurring substance repurposed as a targeted treatment, it works on fat in a way creams and devices simply can’t replicate.

When deoxycholic acid is injected into the fat under your chin, it disrupts the membranes of the fat cells — a process called adipocytolysis, meaning the fat cells are broken apart.² Your body then clears away the destroyed cells naturally over the following weeks. The key point: those fat cells don’t come back. Once they’re eliminated, they’re gone, which is why properly treated areas give a lasting result. The treatment is done as a series of sessions spaced about a month apart, because each session reduces a portion of the fat and the improvement builds visit over visit.

Kybella is one of the better-studied injectables in aesthetics, with multiple large, randomized, placebo-controlled Phase III trials behind it:

• A Phase III randomized controlled trial in the Journal of the American Academy of Dermatology showed ATX-101 produced significant, measurable reduction of submental fat versus placebo, with high patient satisfaction.³
• A separate Phase III, randomized, placebo-controlled study in the British Journal of Dermatology confirmed meaningful submental fat reduction and improvement in how patients felt about their chin and neck profile.⁴
• Another Phase III, randomized, placebo-controlled trial reported both objective fat reduction and improved patient-reported outcomes and a favorable safety profile.⁵
• A pooled analysis of two European Phase III studies reinforced these results across a larger combined patient group.⁶
• A systematic review concluded deoxycholic acid effectively reduces submental fat and increases patient satisfaction compared with placebo.⁷
• And durability is documented: a 12-month study confirmed the results held up over the long term — consistent with permanent fat-cell removal.⁸

Kybella is purpose-built for the submental area — the “double chin.” It’s ideal when:

• You have a distinct pocket of fat under the chin that resists diet and exercise.
• You want a non-surgical alternative to liposuction, with no incisions or general anesthesia.
• You’re looking for a permanent reduction rather than a temporary fix.
• You prefer a gradual, in-office treatment you can fit between everyday life.

Kybella’s safety has been established across multiple Phase III trials.³ ⁴ ⁵ Because the destroyed fat cells are permanently cleared, the result of a completed treatment series is long-lasting and effectively permanent in the treated area — you should not need ongoing maintenance for the same fat.⁸ Expect some swelling under the chin after each session (this is the most common, and expected, effect as the fat is cleared), and possibly temporary bruising, numbness, or firmness that resolves. Because of nearby nerves and structures, who performs your injections and where they place them genuinely matters — this is not a casual treatment.

The number of sessions and the amount injected depend on how much fat you have, your anatomy, and your goals — and Kybella is specifically a fat-reduction treatment, so if loose skin or a band of neck muscle is the main issue, a different plan may serve you better. A careful assessment of what’s actually creating your chin profile is essential before starting. This is a clinical decision. At Lumini, we start with a consultation: our medical team examines the area, confirms Kybella is the right tool for your anatomy, and maps how many sessions you’ll likely need.

We offer Kybella for permanent, non-surgical reduction of the double chin, delivered as a personalized series for a smooth, lasting result. Pricing is personalized at your consultation, because the number of sessions and vials depends on your anatomy and goals. Our team treats patients in English, Spanish, and Portuguese, and we serve Aventura, Sunny Isles, Bal Harbour, and North Miami Beach.

Is Kybella permanent? Yes — Kybella destroys fat cells under the chin and your body clears them away; those cells don’t return, so a completed series gives a lasting result.² ⁸

How many treatments will I need? It varies by how much fat is present and your goals; Kybella is done as a series spaced about a month apart, and your likely number is mapped at consultation.

Does Kybella really work, or is it hype? It’s well supported — multiple large, randomized, placebo-controlled Phase III trials show significant submental fat reduction versus placebo.³ ⁴ ⁵

What’s recovery like? Swelling under the chin after each session is expected as the fat is cleared; temporary bruising, numbness, or firmness can also occur and resolve over time.

Is Kybella better than surgery for a double chin? For the right candidate it’s a non-surgical, no-incision alternative with permanent results — but whether it fits your anatomy (fat vs. loose skin) is decided at your consultation.

Considering treatment locally? See Kybella in Aventura for consultation details at Lumini Medical Spa.

1. Dunican KC, Patel DK. Deoxycholic Acid (ATX-101) for Reduction of Submental Fat. Ann Pharmacother. 2016. PMID: 27340142. https://pubmed.ncbi.nlm.nih.gov/27340142/
2. Dayan SH, et al. Overview of ATX-101 (Deoxycholic Acid Injection): A Nonsurgical Approach for Reduction of Submental Fat. Dermatol Surg. 2016. PMID: 27787266. https://pubmed.ncbi.nlm.nih.gov/27787266/
3. Humphrey S, et al. ATX-101 for reduction of submental fat: A phase III randomized controlled trial. J Am Acad Dermatol. 2016. PMID: 27430612. https://pubmed.ncbi.nlm.nih.gov/27430612/
4. Rzany B, et al. Reduction of unwanted submental fat with ATX-101 (deoxycholic acid), an adipocytolytic injectable treatment: results from a phase III, randomized, placebo-controlled study. Br J Dermatol. 2014. PMID: 24147933. https://pubmed.ncbi.nlm.nih.gov/24147933/
5. Ascher B, et al. Efficacy, patient-reported outcomes and safety profile of ATX-101 (deoxycholic acid), an injectable drug for the reduction of unwanted submental fat: results from a phase III, randomized, placebo-controlled study. J Eur Acad Dermatol Venereol. 2014. PMID: 24605812. https://pubmed.ncbi.nlm.nih.gov/24605812/
6. McDiarmid J, et al. Results from a pooled analysis of two European, randomized, placebo-controlled, phase 3 studies of ATX-101 for the pharmacologic reduction of excess submental fat. Aesthetic Plast Surg. 2014. PMID: 24984785. https://pubmed.ncbi.nlm.nih.gov/24984785/
7. Vertuan M, et al. Is deoxycholic acid able to reduce submental fat and increase patient satisfaction when compared to placebo groups? A systematic review. J Plast Reconstr Aesthet Surg. 2022. PMID: 36123256. https://pubmed.ncbi.nlm.nih.gov/36123256/
8. Beer K, et al. ATX-101 (Deoxycholic Acid Injection) for Reduction of Submental Fat: Results From a 12-Month Open-Label Study. J Drugs Dermatol. 2019. PMID: 31524342. https://pubmed.ncbi.nlm.nih.gov/31524342/

Medically reviewed by Dr. Thiago Queiroz, D.O., Medical Director, Lumini Medical Spa. Educational, not a substitute for an in-person consultation.