Ingredient review
Paper Mulberry Stem Extract
INCI: BROUSSONETIA KAZINOKI STEM EXTRACT
A gentle plant extract that may help even skin tone and protect against environmental damage, but research is still emerging.
In plain English
Paper mulberry stem extract comes from the bark of a tree native to Asia. It contains compounds that can slow down the production of melanin (the pigment that causes dark spots) and also acts as an antioxidant to protect skin from pollution and sun damage. It's considered a milder alternative to stronger brighteners like hydroquinone.
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
Paper Mulberry Stem 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 Paper Mulberry Stem 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
An extract derived from the stem of the paper mulberry tree (Broussonetia kazinoki), rich in flavonoids and phenolic compounds with antioxidant and tyrosinase-inhibiting activity.
How it works
It works primarily by inhibiting tyrosinase, an enzyme involved in melanin production, which can help reduce the appearance of dark spots and uneven skin tone. Its antioxidant content also helps neutralize free radicals that cause premature aging.
Pros
Gentle brightening
Provides a milder alternative to hydroquinone or high-strength acids, making it suitable for sensitive skin types.
Antioxidant support
Helps protect skin from daily environmental damage like pollution and UV-induced free radicals.
Cons and cautions
Moderate evidence
Most research is lab-based; fewer large human trials confirm its effectiveness compared to ingredients like vitamin C.
Variable potency
The concentration of active compounds can vary by harvest and extraction method, leading to inconsistent results across products.
Best for
- Anyone looking for a gentle, plant-based brightening ingredient
- People with sensitive skin who cannot tolerate stronger brighteners
Use caution if
- Those with known allergies to mulberry or fig family plants (rare)
Usage tips
Safety summary
Considered safe for topical use with very low irritation and allergy risk. Avoid if you have a known allergy to mulberry or fig family plants.
Research notes
In vitro studies show significant tyrosinase inhibition and antioxidant activity. A few small human studies suggest improvement in hyperpigmentation, but larger clinical trials are needed for stronger conclusions.
Common label clues
- Typical concentration
- 0.5% to 2% in leave-on products
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU; no specific restrictions beyond standard cosmetic ingredient regulations.
- Common uses
- Serums, Moisturizers, Eye Creams, Brightening Treatments
- Environmental note
- Paper mulberry is a fast-growing tree that can be sustainably harvested, but check for wild-harvested vs. cultivated sourcing.
Good to know
- Often used in Korean and Japanese skincare for brightening
- Can be combined with other brighteners like niacinamide for enhanced effect
Common questions
What is Paper Mulberry Stem Extract in beauty products?
Paper mulberry stem extract comes from the bark of a tree native to Asia. It contains compounds that can slow down the production of melanin (the pigment that causes dark spots) and also acts as an antioxidant to protect skin from pollution and sun damage. It's considered a milder alternative to stronger brighteners like hydroquinone.
What does Paper Mulberry Stem Extract do in a beauty product?
It works primarily by inhibiting tyrosinase, an enzyme involved in melanin production, which can help reduce the appearance of dark spots and uneven skin tone. Its antioxidant content also helps neutralize free radicals that cause premature aging.
Is Paper Mulberry Stem Extract safe for most people?
Considered safe for topical use with very low irritation and allergy risk. Avoid if you have a known allergy to mulberry or fig family plants.
Who should be careful with Paper Mulberry Stem Extract?
Those with known allergies to mulberry or fig family plants (rare)
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.