Ingredient review
Amur Cork Tree Bark Ferment
INCI: Saccharomyces/Phellodendron Amurense Bark Ferment Extract
A fermented botanical extract that soothes and protects skin with antioxidants, ideal for sensitive or stressed skin.
In plain English
This ingredient is made by fermenting the bark of the Amur cork tree (a plant native to East Asia) with yeast. The fermentation process breaks down the bark's compounds, making them easier for your skin to use. It's known for calming redness and fighting free radicals (unstable molecules that can damage skin cells), so it's a good choice if you want to reduce irritation or protect your skin from environmental stress.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- biotech
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Amur Cork Tree Bark Ferment 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 Amur Cork Tree Bark Ferment.
- 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
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A fermented extract derived from the bark of Phellodendron amurense (Amur cork tree) using Saccharomyces (yeast) fermentation. The process enhances the bioavailability of active compounds like berberine, palmatine, and other alkaloids, which have antioxidant and anti-inflammatory properties.
How it works
In a cosmetic product, this extract works by delivering antioxidants that neutralize free radicals, reducing oxidative stress on the skin. It also helps calm inflammation by modulating skin's immune response, which can soothe redness and irritation. The fermentation may also produce additional beneficial metabolites that support skin barrier function.
Pros
Calms irritation
The extract has anti-inflammatory properties that can help reduce redness and soothe sensitive skin, making it a good choice for reactive skin types.
Antioxidant protection
It neutralizes free radicals from pollution and UV exposure, helping to prevent premature aging and skin damage over time.
Cons and cautions
Limited research on this specific form
While the bark itself has traditional use, studies on the fermented extract in skincare are still emerging, so the evidence is not as strong as for more established ingredients.
Potential allergen
As a fermented botanical, it may trigger reactions in people with sensitivities to yeast or plant alkaloids, though this is rare.
Best for
- People with sensitive or reactive skin looking for gentle soothing
- Those exposed to urban pollution or UV stress who want antioxidant support
Use caution if
- Individuals with known allergies to Phellodendron or yeast-fermented ingredients
Usage tips
Safety summary
This ingredient is considered safe for topical use in cosmetics at typical concentrations. Rare allergic reactions are possible, but overall irritation and comedogenic risks are low. Patch testing is recommended for very sensitive skin.
Research notes
Research on Phellodendron amurense bark shows antioxidant and anti-inflammatory activity in vitro and in animal models. Fermentation may enhance these effects, but direct human studies on the fermented extract in skincare are limited. Evidence is moderate and promising but not yet conclusive.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU, with no specific restrictions beyond standard cosmetic ingredient regulations.
- Common uses
- Serums, Moisturizers, Toner
- Environmental note
- The Amur cork tree is cultivated in East Asia; sustainable harvesting practices are important to avoid overexploitation of wild populations.
Good to know
- Fermentation can increase the potency of plant extracts by breaking down complex compounds into smaller, more absorbable molecules.
- Phellodendron amurense bark has been used in traditional East Asian medicine for its anti-inflammatory properties.
Common questions
What is Amur Cork Tree Bark Ferment in beauty products?
This ingredient is made by fermenting the bark of the Amur cork tree (a plant native to East Asia) with yeast. The fermentation process breaks down the bark's compounds, making them easier for your skin to use. It's known for calming redness and fighting free radicals (unstable molecules that can damage skin cells), so it's a good choice if you want to reduce irritation or protect your skin from environmental stress.
What does Amur Cork Tree Bark Ferment do in a beauty product?
In a cosmetic product, this extract works by delivering antioxidants that neutralize free radicals, reducing oxidative stress on the skin. It also helps calm inflammation by modulating skin's immune response, which can soothe redness and irritation. The fermentation may also produce additional beneficial metabolites that support skin barrier function.
Is Amur Cork Tree Bark Ferment safe for most people?
This ingredient is considered safe for topical use in cosmetics at typical concentrations. Rare allergic reactions are possible, but overall irritation and comedogenic risks are low. Patch testing is recommended for very sensitive skin.
Who should be careful with Amur Cork Tree Bark Ferment?
Individuals with known allergies to Phellodendron or yeast-fermented ingredients
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.