Ingredient review
SH-Polypeptide-56
INCI: SH-Polypeptide-56
SH-Polypeptide-56 is a lab-made peptide that may help soften expression lines, but research is still early and results vary.
In plain English
SH-Polypeptide-56 is a small protein fragment (peptide) made in a lab. In skincare, it's added to products to signal skin cells to relax muscle contractions, which can temporarily soften the look of wrinkles, especially around the eyes and forehead. Think of it as a gentle, topical alternative to more aggressive treatments.
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
SH-Polypeptide-56 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 SH-Polypeptide-56.
- 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
SH-Polypeptide-56 is a synthetic peptide, specifically a chain of amino acids designed to mimic natural signaling molecules in the skin. It belongs to a class of peptides often called 'argireline-like' because they work similarly to the well-known peptide Acetyl Hexapeptide-8.
How it works
When applied to the skin, SH-Polypeptide-56 is thought to interfere with the release of neurotransmitters that tell facial muscles to contract. By reducing the intensity of these micro-contractions, the skin above stays smoother, and expression lines (like crow's feet and frown lines) appear less prominent. This effect is temporary and requires continued use.
Pros
Gentle on skin
SH-Polypeptide-56 has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin.
Targets expression lines
It works by relaxing facial muscles, which can help soften dynamic wrinkles like crow's feet and frown lines without needles.
Cons and cautions
Limited research
There are few peer-reviewed studies specifically on SH-Polypeptide-56, so its efficacy is less established compared to more researched peptides.
Temporary results
The smoothing effect wears off once you stop using the product, so it requires ongoing application to maintain benefits.
Best for
- Adults looking for a gentle anti-aging option
- Those with early signs of aging who want to soften expression lines
Use caution if
- Individuals with known allergies to peptides
- Those seeking dramatic, immediate wrinkle reduction
Usage tips
Safety summary
SH-Polypeptide-56 is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, but as with any new ingredient, a patch test is recommended.
Research notes
Research on SH-Polypeptide-56 is still emerging. Most evidence comes from manufacturer studies and analogies to better-studied peptides like Acetyl Hexapeptide-8. Independent clinical trials are limited.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- Regulatory status
- SH-Polypeptide-56 is regulated as a cosmetic ingredient in most regions, including the EU and US. It is not classified as a drug and cannot claim to treat or cure medical conditions.
- Common uses
- Anti-aging serums, Eye creams, Facial moisturizers
- Environmental note
- As a synthetic peptide, SH-Polypeptide-56 is produced in controlled lab conditions, which generally has a lower environmental impact than harvesting natural ingredients.
Good to know
- SH-Polypeptide-56 is often found in eye creams and serums targeting crow's feet
- It is not a substitute for professional treatments like Botox but can be a complementary option
Common questions
What is SH-Polypeptide-56 in beauty products?
SH-Polypeptide-56 is a small protein fragment (peptide) made in a lab. In skincare, it's added to products to signal skin cells to relax muscle contractions, which can temporarily soften the look of wrinkles, especially around the eyes and forehead. Think of it as a gentle, topical alternative to more aggressive treatments.
What does SH-Polypeptide-56 do in a beauty product?
When applied to the skin, SH-Polypeptide-56 is thought to interfere with the release of neurotransmitters that tell facial muscles to contract. By reducing the intensity of these micro-contractions, the skin above stays smoother, and expression lines (like crow's feet and frown lines) appear less prominent. This effect is temporary and requires continued use.
Is SH-Polypeptide-56 safe for most people?
SH-Polypeptide-56 is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, but as with any new ingredient, a patch test is recommended.
Who should be careful with SH-Polypeptide-56?
Individuals with known allergies to peptides Those seeking dramatic, immediate wrinkle reduction
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.