Science
Mechanism of Action
This ingredient functions as a sophisticated skin conditioning agent by forming a breathable, protective film that effectively minimizes transepidermal water loss, thus maintaining skin hydration and lubrication. Its finely milled particles possess a high capacity for absorbing excess sebum, which leads to a refined, matte finish and diminished pore visibility without occluding the skin. The crystalline structure inherently reflects light, imparting a subtle luminosity. Furthermore, its composition of 18 essential amino acids supports the skin's natural moisturizing factors (NMF), enhances elasticity, and promotes the synthesis of vital proteins like collagen and elastin, contributing to barrier repair, anti-aging effects, and a soft-focus blurring of fine lines. It also exhibits anti-bacterial properties and can help mitigate UVB-induced damage.
Research
Clinical Evidence
High confidenceEfficacious concentrations range from 1% to 5% for improving skin hydration, elasticity, and managing oil, with a reported maximum of 1.4% for use in leave-on face powders to align with safety assessments.
Key findings
- 01 Studies at 2-5% concentration demonstrate maintained moisture levels, prevention of dryness, creation of smooth skin texture, effective absorption of excess oil, and minimization of pore appearance.
- 02 At 1-5% concentration, improved skin hydration and elasticity are observed, particularly beneficial for masks and creams.
Transparency
Dusting Analysis
While silk powder is a finely milled ingredient utilized in powder-based cosmetic applications such as face powders, research data does not indicate that it is commonly associated with dusting issues or specific inhalation risks requiring a red-flag percentage. Adherence to appropriate formulation and handling practices is advised for all powder ingredients.
The Formula
Formulation
Stability
Optimal stability and performance are observed within a pH range of 4.0-7.0, with potential degradation occurring outside these parameters. For liquid formulations, it is recommended to incorporate into the water phase during cold processing. For other recipes, add during the cool-down phase below 110°C (230°F).
Conflicts
- Lower quality grades may contain residual sericin, which has the potential to trigger allergic reactions in sensitive individuals. Moumoujus exclusively uses purified grades.
- This ingredient is not considered vegan due to its animal origin.
Safety
Safety Profile
The CIR Expert Panel affirmed the safety of silk proteins and their derivatives, including silk powder, for cosmetic use when formulated to be non-irritating, based on current practices of use and concentration. A 50% concentration was found to be non-sensitizing in a guinea pig skin sensitization study. The maximum reported concentration for leave-on products, such as face powders, is 1.4%. An acute oral toxicity study classified a 30% solution as practically non-toxic (LD50 > 12 g/kg body weight).
Your Skin
Skin Compatibility
Our Assessment
Verdict
Silk powder is a valuable, multifaceted ingredient that simultaneously enhances skin texture, hydration, and luminosity while effectively managing oil and blurring imperfections, making it suitable for a wide range of precision skincare applications.
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