Lactobacillus … Ferment Extract
INCI: LACTOBACILLUS/SACCHAROMYCES/REHMANNIA GLUTINOSA ROOT FERMENT EXTRACT
Reviewed by Rosie · Last updated 14 Aug 2026
A fermented botanical extract that supports skin conditioning and comfort
Best For Skin Types
All, Dry, Sensitive, Mature
Addresses
Usage Frequency
Daily
What Is Lactobacillus … Ferment Extract?
This ingredient is a fermented extract derived from Rehmannia glutinosa root, processed using Lactobacillus and Saccharomyces (beneficial microorganisms). Fermentation breaks down plant compounds into smaller, potentially more bioavailable molecules, which may enhance their ability to interact with skin.
It functions as a skin conditioning agent, meaning it helps improve skin texture, hydration and overall appearance. Fermented plant extracts are increasingly used in skincare for their potential to support skin health through compounds like amino acids and polysaccharides produced during fermentation.
How It Works
Fermentation transforms the plant material, breaking down cell walls and creating smaller molecular compounds that skin can more readily absorb. This process also generates bioactive substances like amino acids and short-chain carbohydrates that support skin hydration and conditioning.
The resulting extract works primarily by improving skin hydration and barrier comfort rather than through a targeted therapeutic mechanism. This makes it particularly suited to formulations designed for general skin health and resilience.
Clinical Evidence & References
Research specifically on this multi-strain fermented extract combination is limited. However, fermented plant extracts and Rehmannia glutinosa have a long history in traditional medicine, and emerging skincare research suggests fermented ingredients may improve skin hydration and antioxidant protection compared to non-fermented counterparts.
More targeted clinical studies would help clarify its efficacy at typical cosmetic concentrations. At present, evidence supports its use as a supportive conditioning ingredient rather than a primary active for specific skin concerns.
How to Use
This ingredient works well in layered routines and pairs with most other skincare actives. It can be used daily as part of essences, serums, creams or sheet masks. Allow products to dry or set before applying subsequent layers to maximise absorption.
Safety & Precautions
Frequently Asked Questions
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