Doctor-led injectable treatment in Singapore
Recombinant Enzyme Injections for Fat, Cellulite & Fibrosis
Recombinant enzyme formulations use specific enzymes such as lipase, collagenase and lyase/hyaluronidase for different tissue targets. They should not be treated as one universal “fat and scar dissolving” injection: the indication, formulation, evidence and risk profile differ by concern.
This page is deliberately cautious. The category is newer than most treatments on this site, the evidence base is thinner, and the term “dissolving injection” is applied loosely across products that have very little in common. Understanding what is actually being injected matters more here than almost anywhere else.
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What are recombinant enzyme injections?
The existing treatment platform used on this page includes recombinant enzymes such as Collagenase G/H PB220 and Lipase PB500, with other enzyme components used in some formulations. Each enzyme is intended to interact with a different substrate — for example collagen, lipid or components of the extracellular matrix.
This makes treatment planning fundamentally different from simply injecting the same product into every area. A fibrosis-dominant scar, cellulite with fibrous septa and a pocket of localised fat are different anatomical problems.
An enzyme is a protein that breaks down a specific substrate, and that specificity is the whole rationale. Collagenase acts on collagen; lipase acts on lipid. The corollary is that an enzyme placed in tissue it was not intended for either does nothing useful or damages something it should have left alone — which is why the diagnosis, the product and the injection depth all have to align.
Different enzymes, different tissue targets
Lipase-containing formulations
Lipase is used in some recombinant enzyme systems aimed at localised adipose tissue. The clinical goal is contour change rather than weight loss.
Collagenase-containing formulations
Collagenase is used in selected fibrosis-oriented protocols where abnormal or dense collagen is part of the problem. Scar type must be diagnosed before considering treatment.
Lyase / hyaluronidase components
These may be used to alter extracellular-matrix characteristics or facilitate dispersion in certain combination protocols. The exact formulation matters.
Not deoxycholic acid
Deoxycholic acid works by disrupting cell membranes chemically, not enzymatically. Different mechanism, different profile, different product.
Not phosphatidylcholine
Older compounded “lipolytic” injections are a separate and historically problematic category. Ask specifically what is being used.
Not hyaluronidase for filler
Hyaluronidase used to dissolve HA filler is a distinct, well-established application and should not be confused with these combinations.
Where treatment may be considered
Selected localised fat
Small, discrete contour concerns may be considered after confirming that the fullness is actually subcutaneous fat rather than gland, muscle, oedema or loose skin.
Compare body-contouring options →Cellulite
Cellulite involves fibrous septa, adipose architecture and skin-surface change. Enzyme combinations targeting more than one component have been studied, but outcomes remain variable.
Explore body aesthetics →Fibrotic or tethered scars
Selected fibrotic scars may be assessed for collagenase-based approaches, but atrophic acne scars, hypertrophic scars and keloids are not interchangeable diagnoses.
Compare scar resurfacing →Post-procedure fibrosis
Firm nodules or fibrosis after surgery or aesthetic procedures require diagnosis first. Infection, seroma, granuloma and other complications must be excluded before elective enzyme treatment.
| Concern | Is an enzyme injection reasonable? | Better-established alternatives |
|---|---|---|
| Small discrete fat pocket | May be considered. | Cryolipolysis or liposuction, both with more predictable outcomes. |
| Larger volume or several areas | No. | Liposuction achieves considerably more in one procedure. |
| Overall weight | No. | Medical weight management. |
| Cellulite dimpling | Studied, outcomes variable. | Subcision-type release of tethers, where appropriate. |
| Tethered or fibrotic scar | May be considered after diagnosis. | Subcision, resurfacing, RF microneedling. |
| Keloid | Not as a primary treatment. | Intralesional corticosteroid-based therapy, silicone, selected surgery. |
| Lower-eyelid fullness | Considerable caution. | Proper eyelid assessment first — see below. |
What this treatment should not be used to imply
Not weight-loss treatment
Local injections do not treat obesity or visceral fat and should not be promoted as a substitute for weight management.
Not one treatment for every scar
Ice-pick, rolling, boxcar, hypertrophic and keloid scars have different biology and often need different treatment combinations.
Not a generic eyebag injection
Lower-eyelid fullness may reflect orbital fat prolapse, oedema, skin laxity or anatomy. Injecting enzymes near the eye requires especially careful indication and risk assessment.
The periocular caution deserves expanding, because “dissolving eyebags without surgery” is heavily marketed and the anatomy is unforgiving. The lower eyelid has thin skin, delicate structures and a blood supply connected to the ocular circulation. Injecting a substance intended to break down tissue into that region carries risks that differ in kind, not just degree, from injecting the abdomen — and a fat pad that has genuinely prolapsed is a surgical problem rather than a chemical one.
Our position is that lower-eyelid fullness gets assessed properly first. Where the finding is true fat prolapse, we will say that surgery is the appropriate answer rather than offering an injectable alternative that sounds easier.
Assessment before treatment
The doctor should confirm the anatomical target, review prior procedures and decide whether injection is appropriate compared with non-invasive treatment or surgery.
Important history to disclose
- allergy history and previous reactions to injectable products;
- pregnancy or breastfeeding;
- active infection or inflammatory skin disease;
- bleeding disorders or anticoagulant use;
- autoimmune or significant systemic disease;
- recent surgery, filler or body-contouring procedures in the area;
- history of abnormal scarring or keloids.
Existing dermal filler in the area matters particularly. Where a formulation contains hyaluronidase, injecting near hyaluronic acid filler can reduce or remove it unintentionally — so previous injectable treatment should be declared with dates and locations rather than mentioned in passing.
Regulatory status and labelled indications may vary by product, formulation and jurisdiction. Suitability should be confirmed for the specific product being used.
Potential side effects and complications
Expected local effects
Pain, tenderness, swelling, bruising, redness and temporary firmness can occur after injections.
Inflammatory reactions
Hypersensitivity, prolonged inflammation, nodules or granulomatous reactions are possible with injectable products and need review if persistent.
Contour and tissue injury
Uneven response, overcorrection, tissue damage or injury to nearby structures can occur if product selection, depth or placement is inappropriate.
Swelling after fat-directed injections can be more pronounced and longer-lasting than patients expect, sometimes persisting for one to two weeks, because the intended effect is a controlled inflammatory process. That is different from an adverse reaction, but the distinction is not always obvious from the outside — which is why increasing pain, spreading redness, fever or a firm enlarging area should be reviewed rather than waited out.
How enzyme injections compare with alternatives
Localised fat
Alternatives include cryolipolysis, other non-invasive body-contouring technologies and liposuction. The choice depends on volume, location, skin laxity and desired predictability.
Read about liposuction →Scars and fibrosis
Depending on scar type, options can include subcision, corticosteroid injection, silicone, laser resurfacing, RF microneedling, surgical revision or observation.
See RF microneedling →Where a well-established alternative exists with a stronger evidence base, that is usually the more sensible starting point. Enzyme injection is most defensible where the target is small and discrete, the diagnosis is clear, and the patient understands they are choosing a newer option with less accumulated evidence behind it.
Frequently asked questions
Are recombinant enzyme injections the same as deoxycholic-acid fat dissolving injections?
No. They are different treatment categories with different active ingredients and mechanisms. The exact product being proposed should be identified before consent.
Can one enzyme injection treat both fat and scars?
Not in a generic sense. Different formulations use different enzymes and proportions for different tissue targets. The diagnosis determines whether an enzyme-based approach is reasonable.
Can enzyme injections treat keloids?
Keloids are biologically active scars with recurrence risk. Established options such as intralesional corticosteroid-based therapy, silicone and selected surgery may be more appropriate, and enzyme treatment should not be presented as a guaranteed keloid solution.
Are results permanent?
No universal permanence claim is appropriate. Fat distribution can change, cellulite can recur and scar tissue can remodel over time.
How many sessions are needed?
There is no universal course. It depends on the formulation, indication, treatment area and response, and treatment should be stopped when there is no reasonable benefit.
What should I ask before consenting?
What exactly is in the syringe and what its regulatory status is for this indication. “Fat dissolving injection” covers several unrelated substances with different safety records.
Why does specificity matter so much?
An enzyme breaks down a particular substrate. Placed in tissue it was not intended for, it either achieves nothing useful or damages something it should have left alone.
Can it dissolve my eyebags?
Lower-eyelid fullness needs proper assessment first. Where the finding is true fat prolapse, that is a surgical problem, and injecting substances intended to break down tissue near the eye carries risks that differ in kind from elsewhere.
Is it better than liposuction?
Not for anything beyond small discrete areas. Liposuction achieves considerably more in one procedure with more predictable contouring.
How does it compare with cryolipolysis?
Both target small localised fat non-surgically. Cryolipolysis has a longer track record; enzyme injection is newer with a thinner evidence base. Neither treats weight.
Why is the swelling lasting so long?
Fat-directed injections work through a controlled inflammatory process, so swelling can persist one to two weeks. Increasing pain, spreading redness, fever or a firm enlarging area should still be reviewed.
Could I be allergic?
These are proteins, so hypersensitivity is a genuine consideration. Any previous reaction to an injectable enzyme, including hyaluronidase, must be declared.
Does it matter if I have filler in the area?
Considerably. Where a formulation contains hyaluronidase, injecting near hyaluronic acid filler can reduce or remove it unintentionally, so declare previous treatment with dates and locations.
Will it help my cellulite?
It has been studied for cellulite, but outcomes remain variable. Cellulite involves fibrous tethering as well as fat, which is why single-mechanism treatments often disappoint.
Can it replace weight loss?
No. Local injections do not treat obesity or visceral fat and should not substitute for weight management.
How strong is the evidence?
Emerging. Small clinical studies and case series exist, but the base is considerably less mature than for established surgical or energy-based treatments.
Is it safe during pregnancy?
Elective injectable treatment is deferred during pregnancy and breastfeeding. Declare it so the plan can be adjusted.
What if a firm lump appears afterwards?
Have it reviewed rather than waiting. Nodules and granulomatous reactions are recognised with injectable products and are easier to manage when addressed early.
Are enzyme injections claimable under MediSave or insurance in Singapore?
Cosmetic treatment is generally not claimable. Where treatment addresses a documented medical condition, check directly with your insurer.
Where is Aquila Medical Center?
Aquila Medical Center is at 160 Robinson Road, #05-01 SBF Centre Medical Suites, Singapore 068914, in the CBD, a short walk from Tanjong Pagar, Shenton Way and Telok Ayer MRT stations.
Selected references
- Liposuction. StatPearls, NCBI Bookshelf.
- Kroumpouzos G, Treacy P. Hyaluronidase for dermal filler complications: review of applications and dosage recommendations.
- Silicone gel and sheeting for scar prevention and management: evidence review.
- American Society of Plastic Surgeons. Non-surgical fat reduction information.
This page is educational and does not replace an individual assessment. Enzyme formulations differ by product and indication, evidence is still emerging, and regulatory status varies by jurisdiction. Results vary and no outcome can be guaranteed. Content reviewed by the medical team at Aquila Medical Center, Singapore. Last reviewed: 26 August 2026.
Start with the tissue diagnosis, not the injection name
Aquila Medical Center can assess whether the concern is localised fat, cellulite, fibrosis or a specific scar type and discuss whether recombinant enzymes — or another treatment — are appropriate.
Where a better-established treatment fits your problem, we will recommend that instead.
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