Ingredient review
Synurus Leaf/Stem Extract
INCI: Synurus Palmatopinnatifidus Leaf/Stem Extract
A gentle plant extract with antioxidant potential, but research is still early and benefits are not yet well-established.
In plain English
This is an extract from a plant called Synurus palmatopinnatifidus, which is a type of thistle. In skincare, it's used to provide antioxidant protection (helping to fight damage from things like pollution and UV rays) and to calm the skin. Because it's a natural extract, it contains many compounds that may work together, but there isn't a lot of scientific research yet to confirm exactly how effective it is compared to more studied ingredients like vitamin C or green tea.
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
- natural
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Synurus Leaf/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 Synurus Leaf/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
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
A botanical extract derived from the leaves and stems of Synurus palmatopinnatifidus, a plant native to parts of Asia. It is typically processed into a liquid or powder form for use in cosmetic formulations.
How it works
The extract contains various plant compounds, such as flavonoids and polyphenols, which can neutralize free radicals (unstable molecules that can damage skin cells). This helps reduce oxidative stress on the skin, potentially slowing signs of aging and supporting a more even skin tone. It may also have mild anti-inflammatory effects, helping to calm redness or irritation.
Pros
Gentle antioxidant
Provides a mild antioxidant boost without the irritation that some stronger actives (like high-concentration vitamin C) can cause, making it suitable for sensitive skin.
Soothing potential
May help calm minor redness or irritation, which is beneficial for those with reactive or easily inflamed skin.
Cons and cautions
Limited research
There are very few peer-reviewed studies on this specific extract in skincare, so its benefits are not as well-documented as more common antioxidants.
Variable quality
As a natural extract, its potency and composition can vary between batches and suppliers, leading to inconsistent results in products.
Best for
- Anyone looking for a gentle, natural antioxidant ingredient
- People with sensitive or reactive skin who want to avoid stronger actives
Use caution if
- Those seeking proven, high-efficacy antioxidants with strong clinical backing
Usage tips
Safety summary
Considered safe for topical use in cosmetics. No significant irritation or allergy risks have been reported, but as with any plant extract, individual sensitivity is possible. Patch testing is recommended for those with very sensitive skin.
Research notes
Research on Synurus palmatopinnatifidus extract is in early stages. Some in vitro studies suggest antioxidant and anti-inflammatory activity, but human clinical trials are lacking. More evidence is needed to confirm its efficacy in skincare.
Common label clues
- Typical concentration
- Typically used at 0.1% to 2% in leave-on products
- Regulatory status
- Generally recognized as safe for use in cosmetics when used as directed. No specific restrictions in the US, EU, or other major markets.
- Common uses
- Serums, Moisturizers, Soothing creams
- Environmental note
- Sourced from wild or cultivated plants; sustainable harvesting practices are important to avoid over-harvesting of natural populations.
Good to know
- This ingredient is often used in Korean and Asian beauty formulations as a soothing and protective botanical.
- Because it's a whole-plant extract, it contains a complex mix of compounds, which can make it harder to predict its exact effects.
Common questions
What is Synurus Leaf/Stem Extract in beauty products?
This is an extract from a plant called Synurus palmatopinnatifidus, which is a type of thistle. In skincare, it's used to provide antioxidant protection (helping to fight damage from things like pollution and UV rays) and to calm the skin. Because it's a natural extract, it contains many compounds that may work together, but there isn't a lot of scientific research yet to confirm exactly how effective it is compared to more studied ingredients like vitamin C or green tea.
What does Synurus Leaf/Stem Extract do in a beauty product?
The extract contains various plant compounds, such as flavonoids and polyphenols, which can neutralize free radicals (unstable molecules that can damage skin cells). This helps reduce oxidative stress on the skin, potentially slowing signs of aging and supporting a more even skin tone. It may also have mild anti-inflammatory effects, helping to calm redness or irritation.
Is Synurus Leaf/Stem Extract safe for most people?
Considered safe for topical use in cosmetics. No significant irritation or allergy risks have been reported, but as with any plant extract, individual sensitivity is possible. Patch testing is recommended for those with very sensitive skin.
Who should be careful with Synurus Leaf/Stem Extract?
Those seeking proven, high-efficacy antioxidants with strong clinical backing
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.