Science
Mechanism of Action
This ingredient actively contributes to skin health through several key mechanisms. It acts as a humectant, efficiently attracting and retaining moisture to significantly boost skin hydration and nourishment. Its antimicrobial and antibacterial properties, achieved by restricting microorganism growth and producing bacteriocins, help rebalance the skin's microbiome to potentially mitigate fungal and bacterial acne. Furthermore, specific metabolites from the Lactobacillus ferment inhibit tyrosinase, an enzyme crucial for melanin production, thereby aiding in the reduction of hyperpigmentation and promoting skin brightening. It also provides robust antioxidant defense through compounds like ferulic acid and polyphenols, neutralizing free radicals and protecting against environmental stressors. An observed calming and anti-inflammatory effect reduces redness and soothes irritated skin, and it may also function as a DNA repair enzyme, safeguarding against environmental aggressors.
Research
Clinical Evidence
Medium confidence2%
Key findings
- 01 Demonstrated efficacy in reducing skin sensitivity.
- 02 Proven effective in treating acne, with a faster reduction in lesion size and redness compared to salicylic acid.
Transparency
Dusting Analysis
The provided research data does not indicate that LACTOBACILLUS/BRASSICA NIGRA SEED FERMENT EXTRACT is commonly dusted, with recommended usage concentrations for antimicrobial effects ranging from 2-4% and clinical efficacy noted at 1-5%.
The Formula
Formulation
Stability
This ingredient is soluble in both water and ethanol, making it suitable for incorporation into water-based formulations or the water phase of emulsions. For optimal antimicrobial performance, an addition concentration of 2-4% is recommended. It should be added during the cooling phase, specifically at temperatures below 70°C (158°F), and prior to the inclusion of thickeners like xanthan gum or Carbopol Ultrez 10. While offering natural antimicrobial benefits, it typically requires complementary pH control or co-preservatives for a comprehensive and effective preservation system, with all final formulations requiring challenge testing.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Lactobacillus Ferment and related ferment-derived ingredients are safe for use in cosmetics. In vitro ocular irritation studies for Lactobacillus Ferment at a 100% concentration demonstrated it to be non-irritating, indicating a low risk for sensitization under typical use conditions. The precise composition of byproducts in cosmetic applications remains often uncharacterized.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This versatile bio-fermented ingredient offers significant benefits for skin health, including hydration, microbiome balance, acne reduction, antioxidant protection, and brightening, all supported by a favorable safety profile.
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