Common Name(s): Bifidobacterium ferment lysate,probiotic cell wall postbiotic,tlr2 immune training active
CAS Number: N/a
DESCRIPTION
What It Does: Trains skin immune cells toward anti-inflammatory m2 phenotype through tlr2 receptor activation by bacterial cell wall fragments, delivers organic acids reinforcing the protective skin acid mantle, and provides biotransformed botanical actives with improved skin penetration.
Why It's Used: Postbiotic lysates deliver the immunological benefit of live probiotics in a stable, preservable format โ tlr2 training providing long-lasting anti-inflammatory tolerance beyond the product's residence time on skin.
How It Works: Bifidobacterium cell wall lipoteichoic acid activates tlr2/tlr6 heterodimers on langerhans cells and keratinocytes โ myd88/traf6 signalling โ irf3 and ap-1 activation โ il-10, il-12 production that polarises t cells toward regulatory (treg) tolerance rather than th2/th17 inflammatory response characteristic of sensitised skin.
Typically Found In: Microbiome skin care,sensitive skin
TECHNICAL DETAILS
Primary Category: Active ingredient โ skin microbiome support
Secondary Functions: Microbiome balance,prebiotic effect
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.5%โ15%
SOURCING & ETHICS
Vegan Status: Yes
Halal Status: Yes
Source Notes: Fermentation-derived or plant-extracted.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 0/5 โ non-comedogenic
Sensitivity Concerns: Non-irritating; beneficial for sensitive skin.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Excellent safety profile. ewg score: 1.
Works Well With: Ceramides,niacinamide,soothing actives
Avoid Combining With: No significant incompatibilities
SCIENTIFIC NOTE
Bifidobacterium tlr2 training effect is durable โ a 4-week topical application study shows 8-week maintained reduction in tewl and inflammatory marker scores, suggesting epigenetic modification of langerhans cell phenotype rather than transient receptor occupancy.
Last Verified: 2026-03-12
Primary Sources: Cosing database,bifidobacterium postbiotic tlr2 immune training review