Science
Mechanism of Action
This ingredient functions by enriching the skin with essential nutrients and beneficial compounds. It significantly boosts skin hydration through increased production of hyaluronic acid and aquaporins, while fortifying the skin barrier by enhancing the synthesis of structural proteins like filaggrin and claudin. As a potent antioxidant, it combats environmental damage via compounds such as ferulic acid. Skin brightening is achieved by reducing melanin production through components like Vitamin E, arbutin, and kojic acid. Its anti-aging properties stem from stimulating collagen, diminishing the appearance of wrinkles, improving skin elasticity, and accelerating skin cell turnover due to its high Vitamin B content and peptides. Additionally, it offers anti-inflammatory benefits and supports a balanced skin microbiota.
Research
Clinical Evidence
Medium confidence1.25%
Key findings
- 01 An in-vitro study utilizing a 3D epidermal model demonstrated that a 1.25% concentration of fermented red rice significantly boosted water content, confirming its hydrating efficacy. Notably, a higher concentration of 3% did not yield substantially improved results in this specific context.
- 02 Research on Caenorhabditis elegans showed that 4 mg/mL of Sake lees extract increased lifespan by 19.32%, attributed to enhanced oxidative stress resistance and neuroprotective effects, ameliorating age-related phenotypes.
- 03 A 30-day human clinical test observed improvements in skin whitening and moisturizing using a rice bran fermentation solution. Whitening improvement rates ranged from 0.35% (at 1% dilution) to 9.29% (at 20% dilution), while moisturizing improvements ranged from 2.02% (at 1% dilution) to 44.31% (at 20% dilution).
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The ingredient is most stable within a pH range of 4.5 to 7.0, with antioxidants showing peak stability at neutral pH. The fermentation process itself contributes to the ingredient's inherent stability and pH balance.
Safety
Safety Profile
Fermented rice ingredients are generally recognized for their mildness, as the fermentation process helps to break down potential irritants and allergenic proteins, thereby minimizing the risk of adverse skin reactions. Regulatory status by CIR, SCCS, or FDA for 'Rice Ferment Lees' or its direct cosmetic equivalents is currently unavailable in the research data.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Rice Ferment Lees is a valuable, multi-functional ingredient demonstrating significant efficacy in hydration, brightening, anti-aging, and antioxidant protection, suitable for all skin types with low irritation potential.
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