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BACILLUS/CABBAGE LEAF FERMENT EXTRACT FILTRATE.

Valuable / SKIN CONDITIONING

A sophisticated postbiotic filtrate engineered through the bacterial fermentation of Brassica oleracea capitata leaves. This bio-transformed ingredient enhances the bioavailability of cruciferous phytonutrients to reinforce the skin's biological defenses and microbiome integrity.

Skin Conditioning Antioxidant Soothing Microbiome Support

Science

The Bacillus fermentation process enzymatically breaks down complex plant cell walls, releasing high-potency bioactive metabolites including sulforaphane, indole-3-carbinol, and phenolic acids. As a postbiotic, it delivers organic acids and peptides that suppress pro-inflammatory signaling pathways (specifically TNF-α and IL-4) while neutralizing oxidative stress at a cellular level.


Research

Medium confidence
Effective range 1–10%
Optimal

5%

Key findings

  1. 01 Topical application in atopic dermatitis models demonstrated a significant reduction in epidermal thickness and pro-inflammatory cytokine expression (2024).
  2. 02 A 10.0% concentration was clinically shown to prevent barrier disruption in cellular monolayers via soluble metabolites like indole-3-lactate (2025).

Transparency

Commonly dusted
Min. effective
1%
Red flag below
0.5%

Because it is a 'trendy' K-beauty ferment, it is frequently included in ingredient lists at negligible concentrations (<0.5%) for marketing claims. Efficacy for barrier repair typically requires concentrations between 2% and 10%.


The Formula

Solubility
Water
Optimal pH 4 – 6
0 7 14

Stability

Maintains structural integrity up to 60°C. Exposure to temperatures exceeding 80°C for extended periods will result in significant loss of enzymatic bioactivity.

Synergies

  • Ceramides
  • Niacinamide
  • Hyaluronic Acid
  • Bifida Ferment Lysate

Conflicts

  • Strong oxidizing agents
  • Formulations with pH > 8.0

Safety

CIR Status
Not reviewed
Pregnancy
Safe
Sensitization risk Low

While this specific filtrate is awaiting independent CIR review, its chemical profile aligns with other Bacillus ferments recently designated as safe for cosmetic use.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

An excellent postbiotic for sensitive and compromised skin barriers, provided it is formulated within the correct pH range and active concentration.


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