Ingredient review
SR-CAT Polypeptide-1
INCI: SR-CAT Polypeptide-1
A lab-engineered peptide that aims to defend skin against pollution and UV-related damage by neutralizing harmful free radicals.
In plain English
SR-CAT Polypeptide-1 is a man-made peptide that copies the action of catalase, an enzyme your body naturally makes to break down hydrogen peroxide (a type of free radical). In skincare, it's added to help shield your skin from environmental stressors like pollution and sunlight, which can speed up visible aging. Think of it as a tiny helper that neutralizes troublemakers before they can harm your skin cells.
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
- synthetic
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
SR-CAT Polypeptide-1 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 SR-CAT Polypeptide-1.
- 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 synthetic peptide that mimics the structure and function of the human antioxidant enzyme catalase. It is produced in a lab using biotechnology and is not derived from plants or animals.
How it works
When applied to the skin, SR-CAT Polypeptide-1 is thought to bind to and neutralize hydrogen peroxide, a reactive oxygen species that can damage skin cells and contribute to fine lines, dullness, and uneven tone. By breaking down this free radical, it helps reduce oxidative stress on the skin.
Pros
Targeted antioxidant action
Specifically neutralizes hydrogen peroxide, a common free radical that can damage skin cells and accelerate visible aging.
Gentle for most skin types
Synthetic peptides generally have a low irritation and comedogenic risk, making them suitable for sensitive or acne-prone skin.
Cons and cautions
Limited independent research
Most evidence comes from the ingredient manufacturer, and there are few peer-reviewed human studies on this exact peptide.
Subtle effects at low concentrations
Because it's used in tiny amounts, the visible benefits may be modest and take consistent use over months to notice.
Best for
- People with urban or high-pollution lifestyles
- Those looking for extra antioxidant protection beyond vitamin C
Use caution if
- Anyone with known allergies to synthetic peptides (rare)
- Those seeking immediate or dramatic anti-aging results
Usage tips
Safety summary
Considered safe for cosmetic use at typical concentrations. No significant irritation or sensitization has been reported in available safety data. As with any new ingredient, patch testing is recommended for those with very sensitive skin.
Research notes
Evidence is primarily from manufacturer studies and in vitro (lab) research showing antioxidant activity. Human clinical data is sparse, but the ingredient is chemically similar to well-studied antioxidant peptides. More independent research is needed to confirm long-term benefits.
Common label clues
- Typical concentration
- Typically used at very low concentrations, often below 1%
- Regulatory status
- Approved for cosmetic use in the EU, US, and other major markets. It is not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Brightening treatments, Environmental protection products
- Environmental note
- Produced via biotechnology, which generally has a lower environmental footprint than animal-derived ingredients.
Good to know
- SR-CAT Polypeptide-1 is often found in serums labeled as 'pollution defense' or 'environmental protection'.
- It is not the same as pure catalase enzyme; it's a synthetic fragment designed for better stability in skincare.
Common questions
What is SR-CAT Polypeptide-1 in beauty products?
SR-CAT Polypeptide-1 is a man-made peptide that copies the action of catalase, an enzyme your body naturally makes to break down hydrogen peroxide (a type of free radical). In skincare, it's added to help shield your skin from environmental stressors like pollution and sunlight, which can speed up visible aging. Think of it as a tiny helper that neutralizes troublemakers before they can harm your skin cells.
What does SR-CAT Polypeptide-1 do in a beauty product?
When applied to the skin, SR-CAT Polypeptide-1 is thought to bind to and neutralize hydrogen peroxide, a reactive oxygen species that can damage skin cells and contribute to fine lines, dullness, and uneven tone. By breaking down this free radical, it helps reduce oxidative stress on the skin.
Is SR-CAT Polypeptide-1 safe for most people?
Considered safe for cosmetic use at typical concentrations. No significant irritation or sensitization has been reported in available safety data. As with any new ingredient, patch testing is recommended for those with very sensitive skin.
Who should be careful with SR-CAT Polypeptide-1?
Anyone with known allergies to synthetic peptides (rare) Those seeking immediate or dramatic 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.