Science
Mechanism of Action
This complex ingredient integrates several distinct yet synergistic mechanisms. The *Enterococcus faecium* and *Lactobacillus* components deliver postbiotic benefits, supporting a balanced skin microbiome, providing antioxidant defense, reducing inflammation, and exhibiting antimicrobial activity. Notably, *Enterococcus faecium* has demonstrated an ability to stimulate the proliferation and self-renewal of skin-derived precursor cells. The *Salix Purpurea Bark/Leaf/Stem/Wood* fermentation introduces natural salicylates, which gently exfoliate, possess anti-inflammatory and antimicrobial qualities, and act as prebiotics to foster a healthy skin microbiota. Ascorbic Acid (Vitamin C) functions as a powerful antioxidant, brightens skin tone, promotes collagen synthesis, and safeguards against environmental damage. Gluconolactone, a polyhydroxy acid (PHA), offers mild exfoliation, refines skin texture, moisturizes, strengthens the skin barrier, and provides anti-aging effects without increasing sun sensitivity.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 For Salix Purpurea Bark Extract at 0.4-2% concentration, in-vitro studies show anti-inflammatory, anti-aging, and prebiotic effects. In-vivo tests on atopic skin demonstrated reduced itching and redness.
- 02 Purple willow extract at 2% concentration has a prebiotic effect, supporting beneficial skin bacteria and mitigating irritations from microbial imbalance, ingrown hairs, keratosis pilaris, and eczema.
- 03 A cell-free extract of Enterococcus faecium L-15 enhanced the proliferation and self-renewal of mouse skin-derived precursor cells, suggesting potential for stem cell maintenance.
Transparency
Dusting Analysis
Data not available to suggest this ingredient is commonly 'dusted' in formulations.
The Formula
Formulation
Stability
This ferment extract filtrate is primarily water-soluble. While a precise optimal pH range for the entire complex is not specified, it is anticipated to be acidic due to the inclusion of Ascorbic Acid and Gluconolactone. The stability of Ascorbic Acid, in particular, is pH-dependent. Similar ferment extracts often show stability and activity within a pH range of 4.0-6.6, with some activity observed in broader acidic (pH 3) to basic (pH 8) conditions.
Synergies
- Microbiome balance with postbiotics
- Gentle exfoliation with natural salicylates and PHA
- Antioxidant protection with Vitamin C and ferment components
- Anti-inflammatory action across multiple components
- Skin barrier repair and moisturizing benefits
Safety
Safety Profile
Direct CIR review for this specific complex ingredient is unavailable. While CIR has noted "insufficient data" for certain 'Lactobacillus Ferment' ingredients regarding specific concentrations, this generally refers to the concentration of live bacteria rather than the non-living fermentation byproducts. 'Lactobacillus/Salix Purpurea Bark Ferment Extract' holds 'No SCCS opinions' on CosIng. However, its individual components, such as willow bark extract and gluconolactone, are widely recognized as gentle and safe for topical use. In-vivo patch tests for Salix Purpurea Bark Extract have demonstrated no irritation or phototoxic effects, with salicin from willow bark being non-irritating even at 100% concentration. Ascorbic Acid is a well-established and commonly used ingredient.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient is valuable for its broad spectrum of benefits, combining gentle exfoliation, powerful antioxidant and anti-inflammatory action, and microbiome support, making it suitable for a wide range of skin types and concerns.
Related
Similar Ingredients
Finding similar ingredients…