Beauty
Bifida Ferment Lysate
Definition
A fermented probiotic ingredient derived from Bifidobacterium lysate. Used as a skin microbiome-supporting active that strengthens barrier function, reduces inflammation, and accelerates cellular repair. Primary active in Estée Lauder Advanced Night Repair and a key differentiator in Korean skincare.
Why it matters for dupe shopping
Estée Lauder does not disclose its concentration in ANR (estimated 5–15% by INCI position). Isntree TW-Real Bifida Ferment Toner discloses 88% concentration at $25 — making it demonstrably higher concentration at 20% of the price. This is the single biggest 'information gain' finding in skincare auditing.