Science
Mechanism of Action
This ingredient functions synergistically through its two primary components. The Saccharomyces ferment filtrate delivers essential amino acids, beta-glucan, and vitamins, acting as a potent antioxidant and soothing agent. It supports skin barrier function and boosts hydration by stimulating aquaporin-3 (AQP3) expression and tight junction protein synthesis. Concurrently, the Selaginella lepidophylla extract, rich in polyols like sorbitol and xylitol, enhances the skin's capacity for water retention and improves its resilience against moisture loss, further contributing to overall antioxidant defense.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
While specific optimal pH range for the stability of SACCHAROMYCES/SELAGINELLA LEPIDOPHYLLA FERMENT FILTRATE is not available, studies on related Saccharomyces boulardii yeast indicate viability is unaltered above pH 4 and stable at pH 6.8, suggesting robust stability in various cosmetic formulations.
Safety
Safety Profile
The CIR Expert Panel issued a second 'Insufficient Data Announcement' (IDA) in November 2023 for 'Yeast-Derived Ingredients', including various Saccharomyces filtrates, requesting further dermal sensitization and toxicity data. While general 'Saccharomyces Ferment Filtrate' has been reported in 212 formulations at up to 2% with robust safety profiles in broader toxicological studies, a specific safety conclusion for this combined ferment filtrate is currently pending.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient presents compelling mechanistic benefits for hydration, barrier support, and antioxidant defense, though specific clinical efficacy data and a definitive CIR safety conclusion for the combined ferment filtrate are currently lacking.
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