Science
Mechanism of Action
This ingredient functions by reinforcing the skin's natural protective barrier and significantly enhancing its hydration capacity. It actively stimulates the skin's endogenous production of crucial structural components, including collagen and hyaluronic acid, which visibly contribute to a smoother and plumper skin texture. Exhibiting potent antioxidant capabilities, it safeguards the skin from free radical damage. Furthermore, its anti-inflammatory properties aid in reducing skin irritation, while its role in harmonizing the skin's microflora helps to mitigate blemishes and improve resistance to environmental stressors. Specifically, Streptococcus thermophilus is observed to increase stratum corneum ceramide levels, thereby improving barrier function and flexibility, and Lactobacillus ferment contributes DNA repair enzyme activity and robust protection against environmental aggressors.
Research
Clinical Evidence
Medium confidence5%
Key findings
- 01 1% Lactobacillus ferment significantly reduced skin sensitivity.
- 02 5% Lactobacillus ferment effectively reduced acne lesions and redness, demonstrating both anti-microbial and anti-inflammatory properties.
- 03 Lactobacillus extract stimulated beta-defensin production in skin cells, enhancing natural defense mechanisms.
- 04 Phytofirm® Biotic, a fermented soybean extract including Lactobacillus/Soybean Ferment Extract, demonstrated benefits in skin firming and elasticity by supporting the natural production of collagen I, collagen V, and elastin.
Transparency
Dusting Analysis
The provided research data does not contain information specific to dusting practices for this ingredient in cosmetic formulations.
The Formula
Formulation
Stability
While optimal pH ranges for individual bacterial components (e.g., Streptococcus thermophilus at pH 6.5; Lactobacillus bulgaricus at pH 5.8-6) and fermented soybean milk (typically pH 4.48-4.52) are understood for the fermentation process, specific optimal pH parameters for the stability of the final filtrate within a cosmetic formulation are not explicitly provided in the available data.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that related Lactobacillus ferment ingredients, including filtrates and lysates, are safe for use in cosmetics, with reported concentrations of Lactobacillus Ferment up to 5.6% in face and neck products. Formulators are advised to ensure the ingredient is not utilized in a manner that induces skin depigmentation, as some data indicated a potential skin lightening effect classified as a drug effect. Generally considered safe and well-tolerated, however, individual sensitivities or allergic reactions to soy products remain a possibility.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This multi-functional ferment filtrate is a valuable asset for comprehensive skin health, offering robust barrier reinforcement, advanced hydration, anti-aging benefits, and essential microbiome balance, making it suitable for all skin types.
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