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Ingredient guide
Lactobacillus Gasseri Ferment Filtrate
In short
A ferment filtrate from Lactobacillus gasseri that offers moisturising and surface‑balancing postbiotic compounds. It’s being explored for supporting clearer‑looking, less reactive skin. Evidence is still developing.
Reviewed against published evidence · editorially independent · no brand pays for placement
Works for
Barrier · Redness
Skin type
Sensitive · Oily
Best used
Anytime
What it is
Ferment filtrate of Lactobacillus gasseri (genus unchanged in 2020 reclassification); commensal skin and vaginal strain producing gassericins active against Staphylococcus species; exopolysaccharide fraction shows skin moisturising and microbiome-modulating potential in early topical studies; emerging in postbiotic skincare targeting acne-related dysbiosis.
Also found as
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Common questions
It supports hydration and helps skin look more balanced, especially where oiliness or visible redness is a concern.
It can suit sensitive or oilier skin looking for microbiome‑aware formulations.
It’s added to essences and serums aimed at maintaining surface balance and comfort.
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Personal guidance only · For clinical concerns, see a dermatologist.