Science
Mechanism of Action
This ingredient functions via its collagenase component, an enzyme mixture (AUX-I and AUX-II) derived from Clostridium histolyticum, which precisely hydrolyzes Type I and Type III collagen in its native triple helical conformation. This leads to the controlled lysis of collagen deposits, a process that, in cosmetic applications, is suggested to stimulate the regeneration of mature skin, strengthen its structure, and visibly reduce wrinkles by mimicking the skin's natural repair mechanisms through endogenous signaling.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
Topical optimal concentrations and typical usage percentages for this cosmetic ingredient are not specified in the available research, making it impossible to establish a 'dusting' threshold or assess common dusting practices.
The Formula
Formulation
Stability
The ingredient, specifically the Collagenase H component, exhibits optimal activity within a pH range of 6.0-8.0. Solutions maintained at neutral pH (approximately 7.0) with a calcium concentration of 0.3-0.5 mM retain activity for at least 5 hours at 37°C. For prolonged stability, storage at -20°C is recommended for several months; however, repeated freezing and thawing cycles should be avoided to prevent activity loss. Calcium is an essential cofactor for its enzymatic activity.
Conflicts
- EDTA
- EGTA
- Cys
- His
- DTT
- 2-mercaptoethanol
Safety
Safety Profile
The related injectable drug, Collagenase Clostridium Histolyticum (CCH-aaes, brand name Qwo), received US FDA approval in 2020 for moderate-to-severe cellulite, with an associated Risk Evaluation and Mitigation Strategy (REMS). Human pharmacokinetic studies for the injectable CCH reported no quantifiable plasma concentrations of its components (AUX-I or AUX-II) following subcutaneous doses up to 3.36 mg. Common adverse events for the injectable form were localized to the injection site, primarily bruising (97.6%), pain (87.8%), and edema/swelling (46.3%). For the cosmetic ingredient, warnings suggest a likelihood of irritation, with increased risk at higher concentrations or in combination with other problematic ingredients, potentially leading to irritation, inflammation, or dryness.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While the enzymatic mechanism for collagen hydrolysis presents a theoretical pathway for skin remodeling and anti-aging benefits, there is a critical lack of specific clinical efficacy and comprehensive safety data for its topical application in cosmetics, coupled with warnings regarding potential skin irritation.
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