Science
Mechanism of Action
Composed of fibroin and sericin proteins, silk extract operates by forming a breathable, moisture-binding veil on the skin's surface, acting as a potent humectant to enhance hydration. Sericin contributes antioxidant protection against UV damage, stimulates collagen production, and exhibits anti-inflammatory and wound-healing effects crucial for cellular regeneration. Fibroin further nourishes and balances the skin, promoting fibroblast proliferation and collagen formation, which collectively strengthens the skin barrier, improves elasticity, and diminishes the appearance of fine lines. Furthermore, sericin can inhibit tyrosinase activity to reduce hyperpigmentation, while silk powder can effectively manage excess moisture and sebum.
Research
Clinical Evidence
High confidence8%
Key findings
- 01 Enhances skin cleansing efficacy and concurrently reduces potential irritation when incorporated in cream formulations.
- 02 Demonstrated a significant increase in skin hydration and a notable reduction in skin pigmentation among renal patients experiencing dry and itchy skin following application of a sericin-containing cream.
- 03 Sericin-based hydrogels effectively improve skin elasticity and actively contribute to preventing visible signs of aging.
- 04 Both fibroin and sericin components of silk stimulate cellular migration, a process vital for efficient tissue regeneration and comprehensive skin repair.
Transparency
Dusting Analysis
While silk powder is utilized in certain cosmetic applications (e.g., face powders) at concentrations up to 1.4% for its moisture and sebum absorbing properties, the primary clinical research and benefits cited for 'silk extract' pertain to its protein components (fibroin and sericin) in liquid-based formulations like creams and hydrogels, where typical 'dusting' concerns are not applicable.
The Formula
Formulation
Stability
Optimal stability is maintained at 24°C or below. Temperatures exceeding 40°C and freezing should be avoided. Prolonged exposure to direct sunlight may compromise ingredient integrity.
Conflicts
- Gross bacterial contamination
- Concentrated nitric acid
- Concentrated sulfuric acid
- Strong oxidizing agents
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Hydrolyzed Silk and eight other related silk protein ingredients safe for cosmetic use within current practice and concentration. Silk extract exhibits a very high safety profile, lacking known toxic properties or stringent regulatory restrictions. Acute oral toxicity studies in rats showed no adverse effects at high doses (up to 10 g/kg or 5 g/kg). The 1.4% maximum concentration reported is specifically for silk powder in leave-on products such as face powders.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Silk Extract is a highly valuable ingredient for precision skincare, offering broad compatibility and scientifically-backed benefits in hydration, anti-aging, and skin repair with an excellent safety profile.
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