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BACILLUS/ROSEMARY LEAF/SOYBEAN FERMENT EXTRACT FILTRATE.

Valuable / ANTIMICROBIAL, HUMECTANT, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SKIN PROTECTING

A high-performance postbiotic complex engineered through the fermentation of rosemary and soybean by Bacillus subtilis. This bio-converted filtrate delivers a potent blend of antimicrobial lipopeptides and bioavailable nutrients to fortify the skin's biological and physical defenses.

antimicrobial humectant skin conditioning skin protecting anti-inflammatory

Science

This ingredient utilizes the enzymatic action of Bacillus subtilis to break down complex plant proteins into bioavailable peptides and amino acids. It generates natural lipopeptides like surfactin, which selectively inhibit pathogenic bacteria such as S. aureus while supporting beneficial microflora. Additionally, it leverages rosmarinic acid for antioxidant protection and soybean isoflavones to stimulate collagen synthesis and structural elasticity.


Research

High confidence
Effective range 1–3%
Optimal

2%

Key findings

  1. 01 In vivo testing of a 2.0% concentration demonstrated a 15-20% improvement in skin barrier integrity and a significant reduction in Trans-Epidermal Water Loss (TEWL) over a 4-week period.
  2. 02 In vitro analysis at 1.0-3.0% showed a measurable reduction in inflammatory markers IL-1α and IL-6, alongside the inhibition of pathogenic bacterial growth.

Transparency

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

To achieve the clinically validated 15-20% barrier improvement, a minimum concentration of 1.0-2.0% is required. Formulations using this extract at lower percentages (e.g., <0.5%) are likely utilizing it for marketing claims rather than functional microbiome or barrier repair benefits.


The Formula

Solubility
Water
Optimal pH 5 – 7
0 7 14

Stability

The extract is highly thermolabile; it must be incorporated during the cool-down phase of formulation at temperatures below 40°C to maintain the integrity of its bioactive peptides.

Synergies

  • Ceramides
  • Niacinamide
  • Prebiotics
  • Hyaluronic Acid

Conflicts

  • Strong oxidizing agents
  • Highly acidic environments (pH < 3.5)
  • Highly alkaline environments (pH > 8.5)

Safety

CIR Status
Not reviewed
Max tested
100%
Pregnancy
Safe
Sensitization risk Low

Composed of GRAS (Generally Recognized as Safe) components; no specific regulatory restrictions in the EU or US.


Your Skin

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

Our Assessment

Valuable

A scientifically robust fermented active that bridges the gap between microbiome health and physical barrier reinforcement at precise concentrations.


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References