Prebiotic/Probiotic/Postbiotic

Lactobacillus/Pueraria Mirifica Root Ferment Filtrate

INCI: LACTOBACILLUS/PUERARIA MIRIFICA ROOT FERMENT FILTRATE

Reviewed by Kate · Last updated 14 Aug 2026

A fermented botanical extract that helps condition and support skin barrier function

Best For Skin Types

All, Sensitive, Dry

Addresses

Dryness, Hydration, Sensitivity, Redness

Usage Frequency

Daily

What Is Lactobacillus/Pueraria Mirifica Root Ferment Filtrate?

This ingredient is a fermented filtrate derived from Pueraria mirifica root, processed using Lactobacillus cultures. Fermentation breaks down plant compounds into smaller molecular fragments, which can be more easily absorbed by the skin. The result is a conditioning agent designed to improve skin texture and hydration.

Pueraria mirifica is a plant traditionally used in Asian skincare, and the fermentation process is intended to enhance its bioavailability and skincare benefits.

How It Works

The fermentation process breaks down complex plant molecules into simpler compounds that the skin can more readily utilise. These smaller fragments act as humectants and skin conditioners, helping to draw moisture into the outer layers of skin and improve its feel and appearance.

The ingredient also appears to have mild soothing properties, which may help reduce visible redness and support a more even skin tone.

Clinical Evidence & References

Limited peer-reviewed clinical data is available specifically for this fermented filtrate. Most evidence comes from the ingredient supplier and cosmetic product testing rather than independent clinical trials.

General research on fermented plant extracts suggests they can improve hydration and skin barrier function, though results vary depending on the specific plant material, fermentation method, and concentration used. More robust clinical studies would help establish the efficacy of this particular ingredient.

How to Use

This ingredient is typically found in serums, essences, and moisturisers. Use as directed on the product label. It can generally be incorporated into both morning and evening routines without concern, though start with once-daily application if your skin is sensitive and increase frequency as tolerated.

Safety & Precautions

Generally well-tolerated in cosmetic formulations. Those with known sensitivity to fermented ingredients or Pueraria mirifica should perform a patch test first.

Frequently Asked Questions

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