Science
Mechanism of Action
Lactobacillus/Barley Extract Ferment Lysate introduces beneficial postbiotics to the skin, comprising metabolites, enzymes, peptides, and organic acids. This complex works to stabilize the skin's natural microbiome, thereby fortifying its barrier and delivering a calming effect. It demonstrably reduces transepidermal water loss (TEWL) and erythema while boosting hydration by modulating immune responses and stimulating antimicrobial peptide production. The ingredient promotes keratinocyte proliferation and migration, supporting natural skin renewal, and helps mitigate UV-induced damage to protect against photoaging. Furthermore, it actively suppresses pathogenic bacteria like Staphylococcus and Streptococcus, preventing various skin issues from infections to acne, and fostering a healthier microbial balance. Its involvement in natural DNA repair mechanisms accelerates recovery from environmental stressors, and its inherent anti-inflammatory properties make it beneficial for conditions such as acne and rosacea. Specific peptides within the lysate may also interact with MC1R to inhibit melanin synthesis, addressing hyperpigmentation, under-eye dark circles, and contributing to a more uniform skin tone. Additionally, it aids in normalizing sebum production and facilitating skin detoxification.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 While specific clinical efficacy concentrations for LACTOBACILLUS/BARLEY EXTRACT FERMENT LYSATE were not identified, related ingredients like Lactobacillus Ferment Lysate Filtrate have demonstrated non-irritating and non-sensitizing properties at concentrations up to 5% in Human Repeat Insult Patch Tests.
- 02 Formulations incorporating Lactobacillus Ferment Lysate have been observed to decrease transepidermal water loss, mitigate redness, and enhance skin hydration, indicating significant barrier support and soothing capabilities.
- 03 Topical application of a cream containing Lacticaseibacillus rhamnosus ferment lysate for 5 days post-SLS induced damage significantly reduced redness and dryness compared to untreated skin.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient exhibits temperature stability up to 60 °C, facilitating its integration into both aqueous and emulsion systems. It is recommended to add during the cooling phase, specifically below 70°C and prior to the introduction of thickening agents. Temporary changes in appearance due to cold exposure during transit or storage can typically be reversed by warming to 45-50 °C. Formulations should account for potential oxidative browning of plant polyphenols present in lactobacillus plant fermentation products, which can impact long-term stability.
Safety
Safety Profile
The CIR Expert Panel has deemed Lactobacillus Ferment and its related lysates (including Lactobacillus Ferment Lysate Filtrate) safe for cosmetic application. The highest documented usage concentration for related Lactobacillus Ferment in leave-on skin products is 5.6%. While generally considered natural and non-toxic, a minimal potential for allergic reaction exists in highly sensitive individuals, suggesting the prudence of a patch test.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient offers a robust portfolio of postbiotic benefits for microbiome support, barrier enhancement, and broad soothing, making it a valuable addition to precision skincare formulations, despite the current lack of specific efficacy concentration data for this exact variant.
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References
Sources