Science
Mechanism of Action
This ingredient functions by strengthening the skin's natural barrier and stimulating its intrinsic self-repair mechanisms. It provides anti-inflammatory and soothing effects, contributing to a visible reduction in redness and irritation. By rebalancing the skin's microbiome, it fosters a healthy array of microorganisms, which helps mitigate issues such as acne and dryness. Possessing humectant properties, it attracts and retains moisture, thereby significantly improving skin hydration. As an antioxidant, it neutralizes free radicals, offering protection against oxidative stress and environmental damage that contribute to signs of aging. The fermentation process yields beneficial compounds including peptides, amino acids, vitamins, and organic acids, which support skin regeneration, pH balance, and potentially enhance collagen production and ceramide synthesis, while also inhibiting tyrosinase for potential skin brightening.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 An essence formulated with this ferment significantly improved stratum corneum water content, skin elasticity, and skin glossiness. It also reduced wrinkle area and ratio, as well as erythema area and ratio, over 28 days of twice-daily application.
- 02 Topical application resulted in a notable 47% reduction in skin redness.
- 03 Demonstrated efficacy for anti-acne effects.
- 04 Showed results in reducing skin sensitivity.
Transparency
Dusting Analysis
Clinical studies indicate efficacy at concentrations as low as 0.5% for anti-aging and barrier benefits, suggesting meaningful biological activity at relatively low levels. Therefore, its inclusion at common active percentages (0.5% to 5.6%) is typically for therapeutic benefit rather than merely label appeal.
The Formula
Formulation
Stability
This ingredient, a filtrate derived from the fermentation of vegetable material, contains various bioactive compounds like peptides and organic acids. It performs optimally within an acidic pH range of 4.0 to 5.0. It integrates well with other active ingredients such as hyaluronic acid, niacinamide, peptides, and botanical extracts to create comprehensive skincare formulations.
Synergies
- Hyaluronic acid
- Niacinamide
- Peptides
- Plant extracts
Safety
Safety Profile
The CIR Expert Panel concluded that this ingredient is safe for cosmetic use at concentrations up to 5.6% in face and neck products (excluding sprays). While generally non-toxic, a slight risk of allergic reaction exists for highly sensitive individuals, for whom a patch test is recommended. Formulators should also be aware of its potential for skin lightening effects to prevent unintended depigmentation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Lactobacillus/Leaf Ferment Filtrate is a valuable postbiotic ingredient offering broad benefits for skin health, including barrier reinforcement, soothing, hydration, and anti-aging effects, suitable for nearly all skin types.
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