Ingredient review
Fermented Licorice Root Complex
INCI: STREPTOCOCCUS THERMOPHILUS/LACTOBACILLUS/BIFIDOBACTERIUM/LICORICE ROOT EXTRACT FERMENT FILTRATE
A fermented botanical complex that may help calm skin and provide antioxidant benefits, though research is still emerging.
In plain English
This ingredient is made by fermenting licorice root extract with three types of friendly bacteria (Streptococcus thermophilus, Lactobacillus, and Bifidobacterium). Fermentation breaks down the plant compounds into smaller, potentially more absorbable molecules. It's used in skincare to help soothe irritation and protect skin from environmental stress, similar to how fermented foods benefit your gut.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- biotech
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Fermented Licorice Root Complex is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Fermented Licorice Root Complex.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
A postbiotic ingredient created by fermenting licorice root extract with a blend of probiotic bacteria. The fermentation process produces a filtrate rich in bioactive compounds, including peptides, organic acids, and licorice-derived antioxidants like glabridin.
How it works
The fermentation process breaks down licorice root compounds into smaller molecules that may penetrate the skin more easily. The resulting filtrate contains metabolites from the bacteria that can help calm inflammation and neutralize free radicals. It works by supporting the skin's natural barrier function and reducing visible redness.
Pros
Gentle soothing potential
The fermentation process may enhance the soothing properties of licorice root, making it a good option for calming redness and irritation without harsh chemicals.
Microbiome-friendly
As a postbiotic ingredient, it can support a balanced skin microbiome, which is important for overall skin health and resilience.
Cons and cautions
Limited research
Most evidence comes from studies on individual components (like licorice root) rather than this specific fermented blend, so its exact benefits are not fully proven.
Potential for variability
The fermentation process can vary between manufacturers, leading to differences in potency and effectiveness from product to product.
Best for
- People with sensitive or reactive skin looking for gentle soothing ingredients
- Those interested in microbiome-friendly skincare with antioxidant benefits
Use caution if
- Individuals with known allergies to licorice root or fermented ingredients should patch test first
Usage tips
Safety summary
This ingredient is considered safe for topical use in cosmetics. The bacteria used are non-pathogenic and commonly found in food fermentation. Patch testing is recommended for those with sensitive skin or allergies to licorice root.
Research notes
Research on this specific fermented blend is limited. Studies on licorice root extract show anti-inflammatory and antioxidant effects, and fermentation is known to enhance bioavailability. More human trials are needed to confirm benefits for this exact ingredient.
Common label clues
- Typical concentration
- 1-5% in leave-on products
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU when used as intended. No specific restrictions beyond standard cosmetic ingredient regulations.
- Common uses
- Serums, Moisturizers, Toners, Masks
- Environmental note
- The fermentation process is relatively eco-friendly, using renewable plant materials and bacteria. However, the final product may require energy-intensive processing.
Good to know
- This ingredient is often found in 'postbiotic' or 'fermented' skincare lines.
- The fermentation process can reduce the need for preservatives, but always check the full ingredient list for stability.
Common questions
What is Fermented Licorice Root Complex in beauty products?
This ingredient is made by fermenting licorice root extract with three types of friendly bacteria (Streptococcus thermophilus, Lactobacillus, and Bifidobacterium). Fermentation breaks down the plant compounds into smaller, potentially more absorbable molecules. It's used in skincare to help soothe irritation and protect skin from environmental stress, similar to how fermented foods benefit your gut.
What does Fermented Licorice Root Complex do in a beauty product?
The fermentation process breaks down licorice root compounds into smaller molecules that may penetrate the skin more easily. The resulting filtrate contains metabolites from the bacteria that can help calm inflammation and neutralize free radicals. It works by supporting the skin's natural barrier function and reducing visible redness.
Is Fermented Licorice Root Complex safe for most people?
This ingredient is considered safe for topical use in cosmetics. The bacteria used are non-pathogenic and commonly found in food fermentation. Patch testing is recommended for those with sensitive skin or allergies to licorice root.
Who should be careful with Fermented Licorice Root Complex?
Individuals with known allergies to licorice root or fermented ingredients should patch test first
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.