Science
Mechanism of Action
This enzyme catalyzes the formation of covalent isopeptide bonds between glutamine and lysine residues within proteins. In the skin, specific transglutaminases (TGM1, TGM3, TGM5) are vital for cross-linking and insolubilizing keratinocyte proteins, thereby constructing the rigid, insoluble macromolecular complex known as the cornified cell envelope. This process is fundamental for epidermal differentiation, regeneration, and the establishment of robust skin barrier functions.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
Due to the absence of specific clinical studies detailing effective concentrations for skincare applications, it is not possible to establish a 'dusting threshold' or common dusting practices for transglutaminase.
The Formula
Formulation
Stability
Transglutaminase exhibits optimal enzymatic activity within a pH range of 5.0 to 8.0, with peak activity observed around pH 6.0. Some activity persists at pH 4.0 or 9.0. While generally heat-stable, its enzymatic activity is irreversibly lost upon heating to 70°C. Mammalian forms require Ca2+ as a cofactor, though bacterial variants can be calcium-independent.
Conflicts
- iron ions (especially in hard water)
- strong complexing agents (e.g., EDTA, MGDA, GLDA, sodium citrate)
Safety
Safety Profile
The U.S. FDA recognizes transglutaminase as 'Generally Recognized As Safe' (GRAS) for food consumption. However, specific safety assessments by the CIR or SCCS for its use as a cosmetic ingredient are currently unavailable. Studies indicate a low irritancy potential on human skin.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While transglutaminase offers a compelling mechanism for enhancing skin barrier function and regeneration, current research data lacks specific clinical efficacy studies with precise concentration data for its cosmetic application.
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