Researched by Helena DeMaria-Williams
Formula IngredientSkin Conditioning AgentBacillus Ferment
INCI: Bacillus Ferment
Bacillus Ferment is a postbiotic ingredient produced by the controlled fermentation of Bacillus bacteria (commonly Bacillus subtilis or Bacillus licheniformis) in water-based solutions. During fermentation, the bacteria release a complex mixture of enzymes (proteases, lipases, amylases), peptides, amino acids, and sugars, which are then filtered, purified, and stabilised for cosmetic use. It functions primarily as a skin-conditioning agent and microbiome-supportive ingredient that softens skin, reinforces the moisture barrier, and may provide mild enzymatic exfoliation depending on the strain used.
Category
Skin Conditioning Agent
Irritation Risk
Low
Skin Types
all skin types, dry, oily, combination, sensitive, acne-prone, blemish-prone
What does this do in a formula?
skin conditioning, barrier support, microbiome balance, mild enzymatic exfoliation, antioxidant protection, soothing, hydration, brightening, anti-ageing
Is Bacillus Ferment safe? Key considerations
Can Bacillus Ferment cause irritation?
Low RiskWell tolerated at typical cosmetic concentrations (0.5–5%). Uncommon reactions include mild redness, itching, or temporary stinging on compromised skin. Rare allergic reactions possible in individuals sensitive to fermented ingredients. No EU CosIng Annex II or III restrictions apply. Patch testing recommended for sensitive skin types.
Does Bacillus Ferment increase sun sensitivity?
No RiskBacillus Ferment does not increase photosensitivity. No special sun protection measures are required based on its presence in a formulation.
Is Bacillus Ferment safe during pregnancy?
SafeNo known extra risk during pregnancy or breastfeeding. Topical absorption is minimal and the ingredient has no hormonal activity. Not flagged by EWG or common pregnancy safety references. As with all skincare, consult a healthcare provider if uncertain.
How does Bacillus Ferment work?
Bacillus Ferment is a postbiotic ingredient produced by the controlled fermentation of Bacillus bacteria (commonly Bacillus subtilis or Bacillus licheniformis) in water-based solutions. During fermentation, the bacteria release a complex mixture of enzymes (proteases, lipases, amylases), peptides, amino acids, and sugars, which are then filtered, purified, and stabilised for cosmetic use. It functions primarily as a skin-conditioning agent and microbiome-supportive ingredient that softens skin, reinforces the moisture barrier, and may provide mild enzymatic exfoliation depending on the strain used.
Individuals with known allergy to fermented ingredients or microbial-derived products should review the considerations above before use.
Which products contain Bacillus Ferment?
Shop products that contain Bacillus Ferment
