Two injections that look similar — but their ingredients, mechanisms, and approval status are completely different.
Introduction
When you catch your profile in the mirror and notice a thicker double chin or a softening jawline, you may start exploring treatment options. Two of the most commonly mentioned are the V-line injection (lipolytic injection) and V-Olet (deoxycholic acid injection).
The similar-sounding names often lead patients to assume they are the same treatment under different brands. In reality, the two differ in their active ingredients, mechanism of action, and regulatory approval status. As Head Doctor of DIORE Clinic in Gangnam, I'd like to walk you through the key differences our patients most often ask about.
What is a V-line (lipolytic) injection?
The V-line injection is a collective term for cocktail injections that contain lipolytic agents to reduce facial fat volume and swelling. It is not a single approved product. Each clinic compounds its own formula using ingredients such as triamcinolone (anti-inflammatory), aminophylline (vasodilator), hyaluronidase (anti-swelling enzyme), and alphocoline.
How it works
- Uses an osmotic mechanism to swell fat cells with fluid before triggering breakdown
- Promotes lymphatic circulation, helping reduce facial puffiness
- Reduces fat cell size rather than eliminating fat cells
Key features
- Indication: cheeks, jawline, double chin, deep cheek, zygomatic area
- Duration: about 6–8 months (varies with formula)
- Treatment interval: every 2–4 weeks, 3–5 sessions recommended
Note: Older V-line formulas containing PPC (phosphatidylcholine) or high-dose steroids were restricted by Korean regulators (MFDS) for cosmetic use due to side effects. Modern formulations are designed with safety as a priority.
What is V-Olet?
V-Olet is the only product approved by the Korean Ministry of Food and Drug Safety (MFDS) for the treatment of submental fat (double chin). Its active ingredient is deoxycholic acid (DCA) — the same molecule used in the U.S. FDA-approved Kybella (ATX-101). V-Olet completed its own Korean clinical trials before receiving approval.
How it works
- Deoxycholic acid is a naturally occurring bile component that breaks down dietary fat
- When injected directly into subcutaneous fat, it disrupts the fat cell membrane, causing permanent fat cell death (adipocytolysis)
- Destroyed cells are absorbed and cleared by immune cells
Key features
- Indication: adults with moderate to severe submental fat (double chin)
- Effect: long-lasting (eliminated fat cells do not return)
- Treatment interval: every 4 weeks, up to 6 sessions
Clinical evidence
In the Korean Phase 3 trial, 12 weeks after the final injection, 71.6% of treated patients showed at least 1-grade improvement in submental fat (vs. 31.9% in placebo), and 23.9% showed at least 2-grade improvement (vs. 7.3% placebo) — a statistically significant difference (p<0.0001).
Side-by-side comparison
| Category | V-line injection | V-Olet |
|---|---|---|
| Active ingredient | Triamcinolone, aminophylline, hyaluronidase, etc. (clinic-compounded) | Deoxycholic acid (single agent) |
| Mechanism | Reduces fat cell size + improves swelling/lymph flow | Destroys fat cell membrane (cell death) |
| Effect duration | Temporary, reversible | Long-lasting, irreversible |
| MFDS approval | No single-product approval | Approved for submental fat |
| Indication | Whole face (cheeks, jaw, zygoma) | Moderate-to-severe submental fat |
| Interval | Every 2–4 weeks | Every 4 weeks |
| Sessions | 3–5 | Up to 6 |
| Downtime | 1–3 days (mild swelling, bruising) | 3–7 days (more pronounced swelling, induration) |
Which one is right for you?
V-line injection may suit you if you:
- Want to address overall facial puffiness and a rounder appearance
- Want to refine the cheeks and zygomatic area as well
- Prefer a lighter, lower-commitment starting point
- Need a temporary refinement of facial contours
V-Olet may suit you if you:
- Have a clearly visible double chin that affects your profile
- Have not seen results from V-line injections in the submental area
- Want long-lasting changes from a single course of treatment
- Have stubborn localized fat that does not respond to diet
Treatments that pair well
After V-Olet reduces submental fat, the overlying skin can appear less taut. Pairing it with HIFU lifting (Ulthera, Shurink) or RF lifting (Coolsonic, InMode) can address contour and elasticity in parallel.
For patients with prominent masseter muscles, chin Botox can complement the result; for those with a recessed chin, chin filler can sharpen the V-line. At DIORE Clinic, we evaluate the entire facial structure before recommending a tailored combination.
Frequently Asked Questions
Q1. Can I switch from V-line injection to V-Olet if results are limited?
Yes, but because the two work through different mechanisms, we recommend at least 4 weeks of recovery between treatments. If your submental fat is moderate or worse to begin with, starting directly with V-Olet is often more efficient.
Q2. Is one V-Olet session enough?
Some patients with mild submental fat see noticeable change after a single session, but clinical data show the highest satisfaction with 2–3 or more repeated sessions. You can assess the result after one session and decide whether to continue.
Q3. How long do swelling and discomfort last?
V-line injections typically cause mild swelling and bruising for 1–3 days. V-Olet, because deoxycholic acid actively destroys fat cells, can produce noticeable swelling and a firm, lumpy feeling for 3–7 days. This is a normal pharmacologic response and resolves on its own.
Q4. Will weight gain reverse the V-Olet effect?
Fat cells destroyed by V-Olet do not return. However, if you gain weight, the remaining surrounding fat cells can enlarge and create a similar appearance. Additional sessions or weight management can address this.
Q5. Can I return to work right away?
You can resume daily activities immediately after a V-line injection. For V-Olet, swelling can be visible, so we recommend allowing at least one week before any important social or professional event.
Q6. Are there any restrictions?
These treatments are not suitable for pregnant or breastfeeding women, patients with active infection or inflammation in the treatment area, or those with bleeding disorders. V-Olet in particular carries a risk of injury to the marginal mandibular nerve and must be performed by a clinician with a thorough understanding of submental anatomy.
Final thoughts
The V-line injection and V-Olet are best understood as "similar-looking but fundamentally different" treatments. V-line injections are gentle cocktail-based volume reducers for the whole face, while V-Olet is a targeted solution that permanently reduces submental fat cells.
Neither is universally superior. The right choice depends on the location of your concern, the degree of fat, and the longevity of result you are looking for. At DIORE Clinic, our medical aesthetics doctors evaluate your submental fat grade and overall facial balance before proposing the most appropriate treatment plan.
Individual results vary based on skin condition. For accurate diagnosis and consultation, please speak with a qualified medical aesthetics professional.