Science
Mechanism of Action
The ingredient is a bioactive ferment filtrate, rich in essential minerals, amino acids (such as glycine and proline), beta-glucan, peptides, and vitamins. It functions as a powerful natural antioxidant, effectively neutralizing free radicals to prevent premature skin aging. It promotes skin regeneration, aids in restoring the skin's protective barrier by stimulating tight junction protein synthesis, and maintains optimal moisture levels through the replenishment of natural moisturizing factors (NMFs) and activation of aquaporin 3 (AQP3) expression. Additionally, it offers soothing and anti-inflammatory benefits, and contributes to improved skin tone and texture. Key components like quercetin and rutin from Sophora japonica buds further enhance its antioxidant and anti-inflammatory actions, shielding against UV-induced damage, boosting elasticity, reducing the appearance of fine lines, and stimulating collagen production.
Research
Clinical Evidence
Medium confidence2%
Key findings
- 01 In clinical applications, this ingredient is frequently utilized in formulations at concentrations up to 2%. This concentration range is supported by its safety profile and widespread use in over 200 cosmetic formulations according to the US FDA's VCRP data (2023) and 2022 concentration of use surveys, suggesting expected efficacy within safe parameters.
- 02 While not specifically for this exact ferment filtrate, a related Saccharomyces boulardii fermented product filtrate demonstrated significant skin barrier improvement and moisturization. Continuous application for four weeks resulted in an average reduction in trans-epidermal water loss (TEWL) by 37.2% and an increase in stratum corneum hydration by 62.5% when used at 5%. This indicates the potential efficacy of similar ferment filtrates in enhancing skin barrier function and hydration.
- 03 Research on the fermentation residue of Saccharomyces cerevisiae (a related yeast) has shown radical scavenging activity, a reduction in tyrosinase activity, and significant suppression of melanin generation in B16F10 cells. A formulation containing this residue also exhibited increased skin whitening activity in a clinical study. This highlights the potential for other Saccharomyces ferments to offer skin brightening benefits, though this specific finding is not directly attributable to the combined Saccharomyces/Sophora Japonica Bud Ferment Filtrate.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient is generally non-irritating. However, formulators should assess for potential aesthetic, stability, or other formulation-specific issues that may limit its utility in certain product types.
Safety
Safety Profile
Reviewed by the Cosmetic Ingredient Review (CIR) Panel and deemed safe for cosmetic use at concentrations up to 2%. While an oral study in mice noted reproductive effects, these were at significantly higher doses and considered irrelevant for cosmetic application. The ingredient's safety is further substantiated by its robust data profile, GRAS (Generally Recognized As Safe) status for Sophora Japonica extract, its endogenous nature, typical low concentrations of use, and a consistent absence of positive alerts across various toxicological studies.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient is a valuable multi-functional active, offering comprehensive benefits for skin health, hydration, barrier repair, and antioxidant protection, with a strong safety profile up to a 2% concentration.
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