Science
Mechanism of Action
The fermentation process converts rice proteins into smaller, more bioavailable peptides, enabling enhanced penetration into the skin barrier. This action actively stimulates the synthesis of essential structural proteins, specifically collagen and elastin, contributing to improved skin elasticity and firmness. The ingredient also significantly boosts the expression of critical moisturizing proteins, including Aquaporin 3 (AQP3), Filaggrin (FLG), and Hyaluronan Synthase 1 (HAS1) mRNA, leading to elevated moisture levels in the epidermis. Furthermore, it strengthens skin barrier integrity through the upregulation of Claudin 1 (CLDN1), Involucrin (IVL), and Zonula Occludens-1 (ZO-1), while its potent antioxidant properties actively reduce reactive oxygen species (ROS) production. The composition is enriched with amino acids, anti-inflammatory peptides, gentle exfoliating lactic acid, and beneficial B vitamins (such as niacinamide) and vitamin E, all contributing to refined skin texture and tone.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Studies indicate that fermented rice ingredients are generally milder, minimizing the risk of skin irritation or allergic reactions.
- 02 Red Rice Aspergillus oryzae fermentation (RRFA) has been shown to promote human dermal fibroblast proliferation, enhance mRNA expression of anti-aging genes like collagen and elastin, and reduce reactive oxygen species (ROS). It also boosts expression of Aquaporin 3 (AQP3), Filaggrin (FLG), and Hyaluronan Synthase 1 (HAS1) mRNA, leading to elevated moisture levels in 3D epidermal models.
- 03 Rice wine lees fermented extract demonstrates excellent effects in relieving skin inflammation, enhancing skin moisturization, and providing gentle exfoliation.
- 04 Fermented rice bran extract significantly increases the synthesis of collagen and elastin, elevates skin moisture content, and enhances the migration of skin fibroblasts, promoting overall skin health and delaying aging processes.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Hydrolyzed rice endosperm protein exhibits high solubility, greater than 88.5%, within the pH range of 3.0 to 7.0, with solubility peaking at 99.8% at pH 6.0. Fermented rice products are known to contribute to stable, pH-balanced formulations, with the fermentation process typically optimized within a pH range of 3.0 to 7.5.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has not specifically evaluated 'HYDROLYZED RICE FERMENT LEES'. However, related hydrolyzed rice derivatives such as Hydrolyzed Rice Bran Extract, Hydrolyzed Rice Bran Protein, Hydrolyzed Rice Extract, and Hydrolyzed Rice Protein have been deemed safe for cosmetic use. The safety profile of this ingredient can be inferred from its source extracts and the generally recognized as safe (GRAS) status of common fermentation organisms like Saccharomyces cerevisiae at food levels. Strict control over impurity content is essential to ensure compliance with cosmetic ingredient safety standards.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Hydrolyzed Rice Ferment Lees is a valuable, multi-functional ingredient that enhances skin hydration, strengthens the skin barrier, provides anti-aging benefits, and offers gentle exfoliation, suitable for all skin types with a low risk of irritation.
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References
Sources