Bifida Ferment Lysate

Bifida ferment lysate — lysed Bifidobacterium cells — is the probiotic active famous from Estée Lauder’s Advanced Night Repair. The lysate contains cell-wall fragments and metabolites that strengthen the skin’s immune defence, accelerate barrier recovery, and protect against UV-induced and oxidative damage in manufacturer and independent studies. It does not colonise skin; it signals it. At 2–10% it improves resilience, smoothness, and recovery from actives. Suits all skin types including sensitive. The grandfathered evidence base of "biome skincare" — decades of market use plus real immunological rationale.