Lactobacillus Ferment Filtrate

Lactobacillus Ferment Filtrate is a postbiotic ingredient derived from the fermentation of Lactobacillus bacteria. Rather than containing live bacteria, it consists of the beneficial compounds produced during fermentation — including metabolites and cellular components — which are then filtered and stabilised for use in skincare products.As a skin conditioning agent, this ingredient is designed to work alongside the skin's natural microbiome and barrier function rather than actively exfoliating or chemically transforming the skin.

Postbiotics work by communicating with the skin barrier and resident microbiota. The fermentation byproducts contain compounds that can signal to skin cells and beneficial bacteria, potentially reinforcing barrier function and promoting a balanced microbial environment.This is distinct from probiotic ingredients (which contain live bacteria). Postbiotics are considered more stable and may pose fewer contamination risks, making them practical for skincare formulations.

Lactobacillus Ferment Filtrate is typically found in serums, essences, and hydrating treatments at low concentrations. Apply to clean skin before heavier creams or oils to allow the ferment to make contact with the skin barrier. It pairs well with other barrier-supporting ingredients such as ceramides and humectants.

Postbiotics are generally well-tolerated and considered safe for topical use. No significant adverse effects have been reported in available clinical studies. Those with extreme sensitivity to fermented ingredients may wish to patch test first.