Science
Mechanism of Action
This hydrolyzed silk protein derivative acts as a potent skin conditioning agent and humectant. Its low molecular weight allows it to penetrate skin cells, where it binds with keratin to form a protective layer, effectively preventing trans-epidermal water loss and promoting deep hydration. Beyond moisture retention, it enhances skin elasticity, accelerates cellular function, and visibly reduces the appearance of fine lines and wrinkles. The ingredient also provides protective benefits against external irritants, exhibits antimicrobial, antioxidant, and anti-tyrosinase activities, and offers some resistance against UV radiation, contributing to comprehensive skin health and regeneration.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 A 20% aqueous solution of hydrolyzed silk was found to be non-irritating and non-sensitizing in human skin irritation and sensitization tests.
- 02 A 6.5% aqueous solution of hydrolyzed silk demonstrated non-irritant properties in human skin irritation tests.
Transparency
Dusting Analysis
No data regarding the ingredient's propensity for 'dusting' or its relevant thresholds were found in the provided research.
The Formula
Formulation
Stability
This ingredient is optimally stable within a pH range of 4.5–5.5. For best preservation, it should be stored in sealed containers below 30°C in a dry place, away from direct sunlight. Prolonged exposure to heat and gross bacterial contamination should be meticulously avoided to prevent degradation and maintain product integrity.
Conflicts
- concentrated nitric acid
- sulfuric acid
- strong oxidizing agents
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that hydrolyzed silk, from which this ingredient is derived, is safe for use in cosmetics at concentrations up to 20%. This assessment is supported by human skin tests demonstrating its non-irritating and non-sensitizing nature. There is no specific SCCS opinion available for this exact ingredient, and it's noted that cosmetic products generally do not require FDA pre-market approval, with the exception of color additives.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This versatile silk derivative is a valuable humectant and skin conditioning agent, enhancing hydration, elasticity, and providing protective benefits suitable for diverse skin types.
Related
Similar Ingredients
Finding similar ingredients…