Lactobacillus Ferment
Lactobacillus probiotic lysate with soothing and barrier-supporting action. Appears in sensitive-skin lines such as La Roche-Posay Toleriane.
Evidence by route
Topical application
The lysate reduces pro-inflammatory cytokines in sensitive-skin models and speeds up barrier repair. Large clinical RCTs outside brand trials remain rare.
How to read tiers A–F
- CWeak evidence. In vitro data, open-label studies, or expert consensus
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Sensitive, Normal, Dry, Combination
About this ingredient
Lactobacillus Ferment Lysate is a lysate of cultivated Lactobacillus bacteria: disrupted cell walls, metabolites and peptides. Technologically close to Lactobacillus Ferment Filtrate but contains cell-envelope fragments. Mechanism. A postbiotic: lysate components activate keratinocyte TLR2 receptors, which in vitro reduces IL-6 and TNF-α production (Gueniche 2010). On skin it works as a soothing ingredient in irritation and dryness. Where applied. Sensitive-skin lines – La Roche-Posay Toleriane, Avène Tolerance Control, Spanish Sesderma Atopises. Concentrations typically 0.1–2%. Evidence base. A double-blind study in 75 sensitive-skin patients (Guéniche 2010) showed reduction in redness and burning over 8 weeks. CIR confirmed safety at cosmetic concentrations. Pregnancy and lactation – safe. Often recommended as a replacement for actives in post-rosacea and post-acne during pregnancy.
Frequently asked questions
Is Lactobacillus Ferment safe during pregnancy?
Lactobacillus Ferment is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Lactobacillus Ferment for?
Lactobacillus Ferment suits: sensitive, normal, dry, combination.
What is Lactobacillus Ferment and what does it do in cosmetics?
Lactobacillus probiotic lysate with soothing and barrier-supporting action.
What's the INCI name for Lactobacillus Ferment?
The INCI name is Lactobacillus Ferment Lysate. It may also appear as: Lactobacillus Ferment Filtrate, Lactobacillus/Soybean Ferment Extract.
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