Ingredient review
Souhakuhi Extract
INCI: Phellodendron Amurense Bark Extract
A gentle botanical extract that helps calm irritation and defend against environmental stress, ideal for sensitive or reactive skin.
In plain English
Souhakuhi extract comes from the bark of the Amur cork tree, a plant used in traditional medicine. In skincare, it works as a mild antioxidant and soothing ingredient. Think of it as a gentle helper that calms redness and protects skin from daily pollution and stress, without causing irritation or breakouts.
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
- natural
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Souhakuhi Extract 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 Souhakuhi Extract.
- 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
Souhakuhi is a water-soluble extract derived from the bark of Phellodendron amurense, a tree native to East Asia. It contains bioactive compounds like berberine, palmatine, and phenolic acids that give it antioxidant and anti-inflammatory properties.
How it works
The extract's antioxidant compounds neutralize free radicals from UV and pollution, reducing oxidative stress on skin cells. Its anti-inflammatory components help calm redness and irritation by modulating inflammatory pathways, making it useful for sensitive or stressed skin.
Pros
Gentle on sensitive skin
Unlike some harsh antioxidants, souhakuhi extract is very low-irritation and well-tolerated even by reactive skin types.
Dual action: soothes and protects
It both calms existing redness and helps prevent future damage from environmental stressors, making it a versatile addition to daily routines.
Cons and cautions
Limited clinical evidence
Most research is lab-based or traditional; there are few modern human trials confirming its efficacy in cosmetic formulations.
Potential for staining
In high concentrations, the yellow-tinted extract can temporarily stain light-colored fabrics or towels, though this is rare in typical skincare levels.
Best for
- People with sensitive or reactive skin looking for gentle soothing
- Anyone wanting extra antioxidant protection in a lightweight formula
Use caution if
- Those with known allergies to Rutaceae family plants (rare)
- Individuals seeking strong, fast-acting anti-aging results
Usage tips
Safety summary
Considered safe for topical use in cosmetics at typical concentrations. Rare allergic reactions are possible, but overall irritation and comedogenic risks are low. Avoid contact with eyes.
Research notes
Lab studies show antioxidant and anti-inflammatory activity, with some traditional use supporting skin-soothing benefits. Human clinical data is limited, but existing evidence is promising for gentle skincare applications.
Common label clues
- Typical concentration
- 0.1% to 2% in leave-on products
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, Japan, and Korea. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Serums, Toners, Moisturizers, Essences
- Environmental note
- Harvested from the bark of Amur cork trees, which are not currently endangered. Sustainable sourcing practices are recommended to avoid overharvesting.
Good to know
- Souhakuhi is a traditional Japanese herbal ingredient often found in J-beauty and K-beauty formulations
- It is sometimes listed under its Japanese name 'Souhakuhi' or as 'Phellodendron Amurense Bark Extract' on labels
Common questions
What is Souhakuhi Extract in beauty products?
Souhakuhi extract comes from the bark of the Amur cork tree, a plant used in traditional medicine. In skincare, it works as a mild antioxidant and soothing ingredient. Think of it as a gentle helper that calms redness and protects skin from daily pollution and stress, without causing irritation or breakouts.
What does Souhakuhi Extract do in a beauty product?
The extract's antioxidant compounds neutralize free radicals from UV and pollution, reducing oxidative stress on skin cells. Its anti-inflammatory components help calm redness and irritation by modulating inflammatory pathways, making it useful for sensitive or stressed skin.
Is Souhakuhi Extract safe for most people?
Considered safe for topical use in cosmetics at typical concentrations. Rare allergic reactions are possible, but overall irritation and comedogenic risks are low. Avoid contact with eyes.
Who should be careful with Souhakuhi Extract?
Those with known allergies to Rutaceae family plants (rare) Individuals seeking strong, fast-acting anti-aging results
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.