Contractubex gel,
does it really help with Superior improvement of scar color, thickness, and pliability and prevention of hypertrophic scarring after surgery or trauma versus other topical treatments?
research showsThe central claim that Contractubex is superior to other topical treatments is rated F because it has been repeatedly and directly contradicted. In a meta-analysis of 13 randomized trials, onion-extract gel improved investigator- and patient-rated scores versus no treatment, but it was not superior to other topical treatments such as petrolatum or silicone in investigator ratings, MD -0.16 (P=0.56), or patient ratings, MD 0.37 (P=0.39); the investigator-rated scar subgroup instead favored the comparators. In a 45-scar trial directly testing Contractubex, silicone gel and silicone sheeting were superior. Some improvement versus no treatment remains a separate C subclaim, but it does not support comparative superiority for color, thickness, pliability, or prevention.
ads claimMarketing turns anti-inflammatory mechanisms and before-and-after photographs into a claim that the product is better than standard topical care for color, thickness, pliability, and hypertrophic-scar prevention. The evidence requires separating possible improvement versus no treatment from superiority versus active alternatives.
Useful facts when choosing a product
- Contractubex combines onion extract, heparin, and allantoin in a topical scar gel, and country-specific labeling governs its authorized use and directions.
- The studied scars included postsurgical, postburn, and hypertrophic scars; natural healing of a new scar is not equivalent to the response of a mature scar.
- Onion-extract-only gels, onion-extract and silicone combinations, and Contractubex differ in composition and formulation, so results from one product cannot automatically be transferred to another.
- Scar care begins after wound closure; infection, wound separation, a rapidly enlarging keloid, or a painful lesion warrants clinical assessment rather than self-treatment alone.
What the research actually shows
Yuan and colleagues synthesized 13 randomized trials and found higher total improvement scores with onion-extract gel than with no treatment, but no superiority over other topical treatments: investigator-rated MD -0.16 (P=0.56) and patient-rated MD 0.37 (P=0.39); the investigator-rated scar subgroup instead favored the comparators. Adverse effects increased versus both no treatment and other treatments, as did intolerance-related withdrawal. Karagoz and colleagues randomized 45 postburn hypertrophic scars, 15 each, to silicone gel, silicone sheeting, or Contractubex for six months. All groups improved from baseline, but both silicone groups were significantly better than Contractubex. Trials were generally small and varied by scar type, formulation, and scale, limiting precision even for comparisons with no treatment.
Why this is classified as F (18)
The central claim of superiority over other topical treatments was repeatedly contradicted by a meta-analysis and a direct comparative trial, giving F with 18 points. The meta-analysis found no superiority in investigator ratings, P=0.56, or patient ratings, P=0.39, the investigator-rated scar subgroup favored comparators, and an exact-combination trial favored silicone. Some improvement versus no treatment remains a separate C subclaim. Contact dermatitis, irritation, and the burden of prolonged application are separate safety issues.
Counterpoint. Someone choosing to try the gel should not replace standard wound care or sun protection and should compare its cost, irritation, and application burden with simple emollient or silicone care over the same period.
Rejudgment record. Cross-check applied — Applied F to the central comparative-superiority claim because a meta-analysis of 13 randomized trials found no superiority over other topical treatments, the investigator-rated scar subgroup favored comparators, and a direct exact-Contractubex comparison favored silicone; retained some improvement versus no treatment as a separate C subclaim
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Superior improvement of scar color, thickness, and pliability versus other topical treatments | F | The meta-analysis found no superiority over other treatments and inferiority in the investigator-rated scar subgroup, while an exact-combination trial also favored silicone. |
| Superior prevention of hypertrophic scarring versus other topical treatments | F | The comparative-superiority prevention claim was not demonstrated in heterogeneous small trials, and direct comparative evidence favored silicone. |
| Some improvement in scar appearance versus no treatment | C | Investigator and patient total-improvement scores were positive, but subjective scales, natural healing, and formulation heterogeneity limit confidence. |
Cross-check — Codex and Claude
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Study 1 | Systematic review and meta-analysis of randomized trials | 13 | Southwest Hospital youth-talent support; no product-related financial conflict reported | Investigator- and patient-rated total scar improvement, adverse effects, and intolerance-related withdrawal | Total improvement scores were higher than with no treatment, but there was no superiority over other topical treatments in investigator ratings, MD -0.16 (P=0.56), or patient ratings, MD 0.37 (P=0.39), and the investigator-rated scar subgroup instead favored the comparators. Adverse effects increased versus other treatments, P=0.008, as did intolerance-related withdrawal, P=0.0002. | Synthesis directly contradicting the central comparative-superiority claim and assessing safety |
| Study 2 | Three-arm randomized active-controlled trial | 15 | Funding source not stated in the PubMed record | Six-month Vancouver Scar Scale | All three groups improved from baseline, but silicone gel and silicone sheeting were significantly superior to Contractubex. | Direct comparative evidence for the exact combination |
Receipt — 2 References
All 2 cited sources were verified for existence at the original page (as of 2026-07-22).
Reviewed and approved: Chamgap Editorial Team · Approval date: 2026-07-22 · Corrections: none
Cite this verdict
[Chamgap] Contractubex gel x superior scar improvement and prevention versus other topical treatments — Evidence Grade F·18. 2 cited sources checked. Source: https://chamgap.com/en/verdicts/skin-hair/contractubex-gel-scar-improvement-prevention-superiority/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.