Science
Mechanism of Action
This ingredient leverages its highly hygroscopic nature, originating from silk proteins, to attract and bind water molecules within the skin. Its small molecular size facilitates deeper penetration, establishing a breathable, moisture-binding protective film that mitigates transepidermal water loss and promotes sustained hydration. By supporting the skin's collagen structure, it aids in maintaining elasticity and minimizing the appearance of fine lines. Furthermore, its surfactant properties provide mild cleansing and foaming action, while its amino acid profile, specifically sericin's hydroxyl groups, contributes to skin barrier repair and moisturizing effects.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The provided research data does not indicate any concerns regarding dusting for this ingredient.
The Formula
Formulation
Stability
Optimal performance is typically observed within a pH range of 4.0 to 7.0; stability may be compromised outside these parameters. For optimal integration, it is recommended to add the ingredient during the cool-down phase of formulation (below 110°C) or within the water phase for cold process formulations.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded Sodium Lauroyl Silk Amino Acids are safe for use in cosmetics at present concentrations, provided formulations are non-irritating. While a 0.5% concentration indicated slight irritation in a HET-CAM test, a 20% solution was not sensitizing in a Local Lymph Node Assay (LLNA).
Your Skin
Skin Compatibility
Our Assessment
Verdict
A versatile ingredient offering significant hydration, elasticity support, and gentle cleansing benefits, suitable for all skin types due to its low irritancy potential and CIR safety approval.
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References
Sources