Science
Mechanism of Action
The ingredient's efficacy is rooted in the fermentation of rice with Lactobacillus bacteria and yeast, a process that generates a beneficial blend of compounds such as amino acids, peptides, enzymes, water-soluble vitamins, organic acids, and polysaccharides. This fermentation reduces molecular size, facilitating deeper skin penetration. Functionally, it acts as a potent moisturizer, bolstering the skin's moisture barrier and improving its resilience and elasticity. It supports a balanced skin microflora, offering soothing and anti-inflammatory properties. As an antioxidant, it effectively neutralizes free radicals, thereby preserving skin youthfulness, diminishing the appearance of fine lines, and enhancing radiance. Additionally, it stimulates collagen production, stabilizes collagen mRNA, and accelerates epidermal cell turnover, leading to comprehensive anti-aging benefits and improved skin tone brightness. Its film-forming capabilities further contribute to reducing transepidermal water loss.
Research
Clinical Evidence
High confidence5%
Key findings
- 01 Supplier recommendations highlight concentrations between 1.0% and 3.0% for this ingredient's richness in antioxidants, ferulic acid, amino acids, saccharides, and peptides.
- 02 An optimal concentration of 0.25% of Yeast/Rice Fermentation Filtrate, when combined with 0.25% sialic acid, significantly enhanced collagen expression in HFF-1 cells. An 8-week application of a cream containing this ferment also notably reduced wrinkle area and length around the eyes while improving skin firmness and smoothness.
- 03 A use rate ranging from 2.0% to 5.0%, with 5% frequently recommended, is indicated for comprehensive skin and hair conditioning, anti-aging benefits, and hydration.
Transparency
Dusting Analysis
While this ingredient demonstrates targeted efficacy at concentrations as low as 0.25% when synergistically combined, comprehensive benefits such as anti-aging, hydration, and skin conditioning are typically observed or recommended at higher concentrations, ranging from 1.0% to 5.0%. Formulations containing less than 0.25% may not deliver the full spectrum of observed benefits.
The Formula
Formulation
Stability
To maintain optimal stability and efficacy, avoid exposure to temperatures exceeding 40°C.
Synergies
- Sialic acid (for enhanced collagen expression and wrinkle reduction)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that related Lactobacillus Ferment Filtrate ingredients are safe as used in cosmetic applications. While specific maximum concentrations for this exact complex are not explicitly reported by CIR, similar yeast-derived ferments (e.g., Galactomyces Ferment Filtrate) have been safely utilized at concentrations up to 90.7%. Notably, SkinSAFE specifically assesses 'Lactobacillus/Saccharomyces/Rice/Sucrose Ferment Filtrate' as '100% Free' of the most common allergy-causing ingredients and 'Irritant Free,' suggesting an excellent safety profile for all skin types, including sensitive skin. Long-term studies indicate very rare instances of allergic reactions or sensitivity, with no documented serious adverse effects.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This highly beneficial fermented ingredient offers a broad spectrum of proven skincare advantages, including enhanced hydration, significant anti-aging effects, robust barrier support, and an excellent safety profile, making it an essential component for comprehensive skin health across all skin types.
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