A Practitioner’s Guide to Fat Dissolving Injections
Fat dissolving injections are non-surgical injectable treatments that eliminate localised subcutaneous fat deposits through either direct adipocyte lysis or enzymatic metabolic pathways. The two most widely used agents in European aesthetic practice are Aqualyx (CE-marked medical device) and Lemon Bottle (cosmetic injectable). Both are indicated for localised fat resistant to diet and exercise.
Key takeaways:
- Aqualyx (CE-marked medical device) and Lemon Bottle (cosmetic injectable) address the same indication through different mechanisms — choose based on patient profile and downtime tolerance.
- Aqualyx uses direct adipocyte lysis; Lemon Bottle uses enzyme-based metabolic activation. The difference in mechanism explains the difference in recovery.
- Both agents can be used across a wide range of anatomical areas — submental, abdomen, flanks, thighs, arms, knees and back.
- GLP-1 patients represent a growing indication: localised residual fat following medical weight loss responds well to injectable fat dissolving, particularly Aqualyx.
- Fat dissolving is a contouring tool, not a weight loss intervention — this must be established clearly at consultation.
1. How Fat Dissolving Treatments Work
Fat dissolving injectables work by reducing the volume of localised subcutaneous adipose tissue. The mechanism differs between product types, but in both cases the end result is a reduction in fat cell volume followed by clearance of the resulting material through the body’s lymphatic system.
Deoxycholic acid pathway — Aqualyx
Aqualyx contains a deoxycholic acid derivative — a compound structurally related to a secondary bile acid naturally present in the body. When injected into subcutaneous fat, it disrupts the phospholipid bilayer of the adipocyte cell membrane, causing cell lysis. The released lipid contents are cleared via the lymphatic system. The inflammatory response it produces (oedema, erythema, tenderness) is both expected and integral to the treatment process [3,4].
Botanical and enzymatic pathway — Lemon Bottle
Lemon Bottle is a cosmetic injectable formulated from riboflavin (vitamin B2), bromelain (a proteolytic enzyme derived from pineapple) and lecithin. Its mechanism works through metabolic and enzymatic pathways: activating fat cell metabolism, supporting the emulsification of triglycerides and facilitating lymphatic drainage. This approach does not involve direct cell lysis, which corresponds to the milder post-treatment profile consistently reported by practitioners.
Clinical insight:
The difference in mechanism is clinically significant. Aqualyx produces a more pronounced inflammatory response as part of its intended action — practitioners should prepare patients for this explicitly. Lemon Bottle’s milder profile makes it a practical option for patients where downtime is a primary concern, or for areas where significant post-treatment swelling is particularly inconvenient.
2. Aqualyx and Lemon Bottle — Product Overview and Comparison
Aqualyx
Aqualyx is a CE-marked medical device developed by Professor Pasquale Motolese and first introduced in 2009. It is supplied in 8 mL vials and injected into the subcutaneous fat layer using a fine-gauge needle or cannula. Lidocaine is commonly added to the solution or applied topically. Ultrasound guidance is recommended for technically demanding areas. Clinical data supporting its mechanism is well-established in the peer-reviewed literature [1,4]. Available from Fräya: Aqualyx 10 × 8 mL
Reference: Salti G, Motolese P. Cavitational adipocytolysis with a micro-gelatinous injectable. Eur J Aesthetic Med Dermatol. 2012;2(2):94–97.
Lemon Bottle
Lemon Bottle is a cosmetic injectable of South Korean origin that has become one of the most widely adopted fat dissolving products across European aesthetic clinics. Its botanical formulation — riboflavin, bromelain and lecithin — produces a gentler tissue response than deoxycholic acid-based agents. Practitioners report earlier visible results, with initial contouring often apparent within 72 hours of a session, and a post-treatment experience that patients generally find more comfortable. Available from Fräya: Lemon Bottle 5 × 10 mL
The following table summarises the key clinical differences:
| Aqualyx | Lemon Bottle | |
| Classification | CE-marked medical device | Cosmetic injectable |
| Active ingredients | Sodium deoxycholate (deoxycholic acid derivative), phosphatidylcholine | Riboflavin (B2), bromelain (pineapple enzyme), lecithin |
| Mechanism | Cytolytic — direct adipocyte membrane disruption → lysis → lymphatic clearance | Enzyme-based — metabolic activation, triglyceride emulsification, lymphatic drainage support |
| Post-treatment | Pronounced oedema and erythema — part of mechanism; 1–2 weeks | Milder response; faster return to normal activities |
| Typical sessions | 2–8, spaced 3–6 weeks | 2–6, spaced 3–4 weeks |
| Results onset | Visible from weeks 2–6; full result at 6–12 weeks post-course | Often visible earlier; results develop progressively across sessions |
| Best for | Moderate-to-significant localised fat; larger deposits; post-GLP-1 patients | Mild localised deposits; minimal downtime priority; first-time injectable patients |
Compare availability and pricing for both agents: View fat dissolving range →
3. When to Choose Which — Clinical Decision Framework
Selecting between Aqualyx and Lemon Bottle should be driven by the clinical picture, the patient’s lifestyle and their tolerance for post-treatment recovery — not by product familiarity alone. The table below provides a structured decision reference.
| Choose Aqualyx when… | Choose Lemon Bottle when… |
| • Moderate-to-significant localised fat deposits• Abdomen, flanks or other larger body areas• Post-GLP-1 patients with residual localised fat• Predictability and established evidence base required• Ultrasound guidance available• Patient is comfortable with 1–2 weeks recovery | • Mild, localised deposits in smaller areas• Minimal downtime is a key patient priority• First-time injectable fat dissolving patient• Submental or arms — where visible swelling is inconvenient• Previous difficult recovery from deoxycholic acid treatment• Faster visible results between sessions preferred |
For larger fat deposits, abdomen, flanks or post-GLP-1 patients — Aqualyx remains the more predictable clinical choice.
For mild localised deposits, first-time patients or where minimal downtime is a priority — Lemon Bottle is often the preferred option in clinical practice.
When in doubt — both agents can be offered within the same clinic, with product selection determined at consultation based on the individual patient profile.
Clinical note:
Both agents can be used across overlapping indications. Many clinics offer both — and patient preference, following a thorough consultation that explains the difference in mechanism and recovery, is a valid and important input into the decision.
These patients are often ideal candidates for injectable fat dissolving. They have already achieved stable weight, their overall body composition has improved substantially, and the remaining localised deposits — typically submental, flank, abdominal and inner thigh — are precisely the type of problem that fat dissolving addresses most effectively.
4. Fat Dissolving and the GLP-1 Patient — A Growing Indication
GLP-1 receptor agonists (semaglutide, tirzepatide) have fundamentally changed the landscape of weight management in aesthetic and general medicine. Patients achieving significant weight loss through GLP-1 therapy frequently present to aesthetic clinics with a specific and clinically well-defined problem: residual localised fat deposits that remain disproportionate to their overall body composition following weight reduction.
Clinical considerations for GLP-1 patients
- Ensure weight has been stable for at least 3 months before commencing fat dissolving treatment — active weight loss changes the target anatomy between sessions
- GLP-1 patients may present with reduced skin elasticity in previously larger areas — skin quality assessment is particularly important before treating the abdomen or arms
- Fat volumes in post-GLP-1 patients can be moderate to significant — Aqualyx is generally better suited for larger deposits; Lemon Bottle for smaller residual pockets
- Skin laxity may be a co-presenting concern — Profhilo Body Kit can complement fat dissolving in the same patient presentation
- Document current GLP-1 status and medication at consultation — ongoing therapy influences body composition trajectory and treatment planning
Clinical insight:
Post-GLP-1 body contouring is one of the fastest-growing indications in European aesthetic practice. Positioning fat dissolving as part of a structured post-weight-loss body treatment offering — including skin quality and laxity management — creates significant clinical and commercial value for practices already seeing GLP-1 patients.
Build your post-GLP-1 body contouring offering: View the full body contouring range →
5. Treatment Areas
Both Aqualyx and Lemon Bottle can address a wide range of anatomical areas — from the submental region and jowls to the medial knees and back [5].
Submental region and chin
The highest-demand indication. Results are highly visible and the anatomy is well-defined. Aqualyx requires particular technical precision here; ultrasound guidance is strongly recommended. Lemon Bottle’s milder inflammatory profile can be advantageous in this area — post-treatment swelling in the neck is socially inconvenient for most patients.
Abdomen and flanks
The most commonly treated body areas. Fat volumes are larger, so session count and product volumes increase accordingly. Both agents perform well with appropriate patient selection. Compression garment use post-treatment is important for both.
Thighs, arms and knees
Inner and outer thigh fat, triceps area deposits and medial knee fat pads all respond well to fat dissolving treatment. Skin laxity assessment is particularly important for the arms. For the medial knee, published clinical data for Aqualyx under ultrasound guidance exists in the literature (Mlosek et al., J Ultrason 2021) [2].
Back, jowls and pseudo-gynaecomastia
Bra rolls, infrascapular deposits and posterior flank bulges are frequently overlooked but clinically valid indications. In male patients, pseudo-gynaecomastia (fat-only, not glandular) responds well — distinguishing it from true gynaecomastia is essential before treatment.
| Area | Sessions (Aqualyx) | Sessions (LB) | Clinical notes |
| Submental / double chin | 2–4 | 2–4 | Most requested area; ultrasound guidance recommended for Aqualyx |
| Abdomen | 4–8 | 3–6 | Larger surface — volume and sessions increase accordingly |
| Flanks / love handles | 3–6 | 3–5 | Often treated bilaterally in one session; compression garment useful |
| Inner & outer thighs | 4–8 | 3–6 | High demand; realistic outcome framing essential at consultation |
| Upper arms (triceps area) | 3–5 | 2–4 | Skin laxity assessment critical pre-treatment |
| Knees (medial fat pad) | 2–4 | 2–3 | Peer-reviewed data available for Aqualyx in this indication [2] |
| Back / bra rolls | 4–6 | 3–5 | Multiple localised deposits addressable in one session |
| Jowls / submandibular | 2–3 | 2–3 | Fine anatomical precision required; cannula preferred |
| Pseudo-gynaecomastia | 2–4 | 2–3 | Fat-only cases only; true gynaecomastia is a contraindication |
6. Patient Selection
Appropriate patient selection is the most important factor in outcome quality. Fat dissolving achieves its best results within a well-defined clinical context — it is a contouring tool, not a weight management intervention.
Suitable candidates
- Adults with stable body weight, ideally within 15% of their healthy weight range
- BMI generally ≤30 (some practitioners extend to 35 for specific indications)
- Localised adiposity at the target site, distinct from overall body fat distribution
- Good to adequate skin elasticity at the treatment area
- Realistic expectations — established clearly during consultation
- No active skin conditions, infection or inflammation at the treatment area
Contraindications
- Pregnancy or breastfeeding
- Lipodystrophy
- Severe hepatic or renal impairment
- Active infection at the treatment area — defer until resolved
- Known hypersensitivity to any product component
- Anticoagulant therapy or bleeding disorder — assess individually
Clinical communication point:
The distinction between contouring and weight loss must be established in writing at consultation. Patients presenting with generalised overweight, or expecting substantial overall size reduction, are unlikely to achieve their goals through fat dissolving treatment.
7. Post-Treatment Recovery
Clear pre-treatment counselling about what to expect after each session is as important as technique. The recovery profiles of Aqualyx and Lemon Bottle differ significantly.
Aqualyx recovery
- Days 1–5: Pronounced oedema, erythema and tenderness — expected and intentional. Cold compress, compression garment, avoid exercise and alcohol.
- Days 5–14: Swelling reduces. Lymphatic drainage massage supportable from day 5. Bruising resolves.
- Weeks 2–6: Progressive visible reduction as inflammation resolves and fat debris clears via lymphatics.
- 6–12 weeks post-course: Full result assessment. Eliminated fat cells do not regenerate.
Lemon Bottle recovery
- Days 1–2: Minimal swelling. Most patients return to normal activities the same day or the following morning.
- Days 2–14: Initial contouring often visible within 72 hours. Continued improvement across sessions.
- Post-course: Full progressive result. Second session typically at 3–4 weeks.
Standard post-treatment guidance — both agents
- Compression garment: Essential for body areas. 3–7 days minimum for Aqualyx; area-dependent for Lemon Bottle.
- Exercise: Avoid strenuous activity for 48–72 hours. Light walking from day 1 is acceptable.
- Alcohol and heat: Avoid for at least 48 hours.
- Hydration: Supports lymphatic clearance.
- Lymphatic drainage massage: From day 5 for Aqualyx; supports distribution and debris clearance.
- Follow-up: At 3–4 weeks — assess response, document progress, schedule next session.
Why Practitioners Source Fat Dissolving Products from Fräya ?
Fräya Med Supply is a B2B distributor of aesthetic medicine products operating across Europe and the United States. Our fat dissolving range — including Aqualyx and Lemon Bottle — is sourced directly from verified manufacturers and made available exclusively to licensed aesthetic practitioners.
CE-verified sourcing
All medical devices in the Fräya range, including Aqualyx, are CE-marked and sourced through verified supply chains. Product documentation is available on request.
Immediate EU dispatch
Orders placed through frayamedsupply.com are dispatched for delivery across our European markets. Stock availability is updated in real time on the platform.
Licensed practitioners only
The Fräya platform is restricted to registered aesthetic professionals. All accounts are verified before purchase access is granted.
Competitive wholesale pricing
Fräya offers volume-based pricing across the fat dissolving range. Practitioners can compare unit economics directly on the product pages.
Full body contouring range
From fat dissolving to biostimulators, skin boosters and body fillers — Fräya provides a single-supplier solution for the complete aesthetic treatment menu.
8. Build Your Complete Body Contouring Menu
Injectable fat dissolving addresses one layer of the body treatment menu. Patients presenting for fat reduction frequently also have skin laxity, cellulite or volume concerns — all of which can be addressed within a structured multi-treatment offering.
| Concern | Product | Clinical role |
| Localised fat | Aqualyx · Lemon Bottle | First-line fat reduction |
| Cellulite | Alidya | Only CE-marked injectable specifically indicated for cellulite |
| Skin laxity | Profhilo Body Kit | Injectable HA bioremodelling for skin quality and laxity in body areas |
| Body volume / contour | HYAcorp · Refine+ Forma | HA-based volumetric contouring |
Why Practitioners Source Fat Dissolving Products from Fräya ?
Fräya Med Supply is a B2B distributor of aesthetic medicine products operating across Europe. Our fat dissolving range — including Aqualyx and Lemon Bottle — is sourced directly from verified manufacturers and made available exclusively to licensed aesthetic practitioners.
CE-verified sourcing
All medical devices in the Fräya range, including Aqualyx, are CE-marked and sourced through verified supply chains. Product documentation is available on request.
Immediate EU dispatch
Orders placed through frayamedsupply.com are dispatched for delivery across our European markets. Stock availability is updated in real time on the platform.
Licensed practitioners only
The Fräya platform is restricted to registered aesthetic professionals. All accounts are verified before purchase access is granted.
Competitive wholesale pricing
Fräya offers volume-based pricing across the fat dissolving range. Practitioners can compare unit economics directly on the product pages.
Full body contouring range
From fat dissolving to biostimulators, skin boosters and body fillers — Fräya provides a single-supplier solution for the complete aesthetic treatment menu.
FAQ — Fat Dissolving Injections
What is fat dissolving treatment?
Fat dissolving (also referred to as injection lipolysis or adipocytolysis) is a non-surgical procedure that uses injectable agents to break down localised subcutaneous fat deposits. The fat debris is subsequently cleared through the lymphatic system.
How many sessions are needed?
Session count varies by product, area and individual response. Aqualyx typically requires 2–8 sessions; Lemon Bottle 2–6 sessions. Both are spaced 3–6 weeks apart to allow full tissue response between treatments.
Is fat dissolving a weight loss treatment?
No. Fat dissolving is a body contouring tool for reducing localised, resistant fat deposits in patients who are close to their target weight. It is not an appropriate treatment for general overweight or obesity.
Is Lemon Bottle available in Europe?
Yes. Lemon Bottle is a cosmetic injectable widely used across European aesthetic practice, formulated from botanical active ingredients.
What is the difference between Aqualyx and Lemon Bottle?
Aqualyx is a CE-marked medical device based on deoxycholic acid, working through direct adipocyte membrane disruption. Lemon Bottle is a cosmetic injectable using riboflavin, bromelain and lecithin, working through metabolic and enzymatic pathways. The key clinical difference is the post-treatment profile: Aqualyx produces a more pronounced inflammatory response; Lemon Bottle is associated with a milder recovery.
Who is a suitable candidate?
Adults with stable body weight, localised fat deposits and good skin elasticity at the target area. BMI generally ≤30. Patients should have realistic expectations — fat dissolving improves contour; it does not substitute for lifestyle management.
Are results permanent?
The fat cells eliminated through treatment do not regenerate. Results are durable provided body weight remains stable.
Can fat dissolving treat post-GLP-1 body changes?
Yes. Patients who have lost significant weight through GLP-1 agonist therapy (semaglutide, tirzepatide) often present with residual localised fat deposits that are disproportionate to their overall body composition. Aqualyx is particularly well-suited for these patients given the often-larger fat volumes involved.
References
1. Salti G, Motolese P. Cavitational adipocytolysis with a micro-gelatinous injectable for subcutaneous adipose tissue volume reduction. Eur J Aesthetic Med Dermatol. 2012;2(2):94–97.
2. Mlosek RK et al. The efficacy of high-frequency ultrasound-guided injection lipolysis in reducing fat deposits on the inside of the knees. J Ultrason. 2021;21(84):e1–e6. PMC7830143.
3. Rzany B et al. Efficacy and safety of injection lipolysis with phosphatidylcholine and deoxycholate. J Drugs Dermatol. 2014. PMID: 25057132.
4. Humphrey S et al. ATX-101 for reduction of submental fat: A phase III randomized controlled trial. Aesthet Surg J. 2016. PMID: 26939577.
5. Amore R, Pinto H et al. Intralipotherapy, the State of the Art. Plast Reconstr Surg Glob Open. 2016;4(10):e1085. PMID: 27826492.
