Science
Mechanism of Action
Soluble Keratin functions by stimulating skin cells to proliferate, significantly increasing their intrinsic production of structural proteins. This leads to a measurable increase in epidermal thickness, contributes to the visible reduction of fine lines and wrinkle depth, and fortifies the skin's barrier function. Additionally, it acts as a humectant, drawing moisture into the stratum corneum, and forms a protective film to minimize transepidermal water loss.
Research
Clinical Evidence
Medium confidenceN/A
Transparency
Dusting Analysis
No specific information regarding dusting of Soluble Keratin was found in the research data.
The Formula
Formulation
Stability
Formulations containing keratin-derived ingredients, including Soluble Keratin, are generally stable within a skin-friendly pH range of 5.5 to 7.5, which aligns with optimal skin physiology.
Conflicts
- No specific incompatibilities with other cosmetic ingredients were reported. However, formulators must ensure that animal-derived sources are rigorously tested to be free of pathogens, pesticide residues, and heavy metals.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded Soluble Keratin is safe for use in cosmetics at concentrations up to 10%. Human studies have demonstrated it to be non-irritating and non-sensitizing via Human Repeat Insult Patch Tests (HRIPTs). The FDA permits keratin derived from cattle hooves or horns, provided the raw materials meet stringent purity and safety standards regarding infectious pathogens and impurities.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Soluble Keratin is a valuable, well-tolerated ingredient capable of enhancing skin regeneration, firmness, and barrier function through its unique cellular stimulatory and humectant properties.
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References
Sources