Ingredient review
SH-Polypeptide-26
INCI: SH-Polypeptide-26
A lab-made peptide that signals skin to build more collagen, helping reduce fine lines over time.
In plain English
SH-Polypeptide-26 is a short chain of amino acids (the building blocks of protein) made in a lab. When applied to skin, it acts like a messenger, telling skin cells to produce more collagen and elastin. This helps plump the skin and soften the look of wrinkles. It's a gentle ingredient, unlikely to cause irritation, and is often found in anti-aging products.
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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
SH-Polypeptide-26 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-26.
- 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
A synthetic peptide, specifically a signal peptide, designed to mimic natural protein fragments that trigger collagen synthesis in the skin.
How it works
It binds to receptors on skin cells (fibroblasts) and activates signaling pathways that increase the production of collagen and elastin, the structural proteins that keep skin firm and elastic.
Pros
Gentle anti-aging
Unlike retinol, SH-Polypeptide-26 rarely causes peeling, redness, or irritation, making it suitable for sensitive skin.
Supports natural collagen
It works with your skin's own biology to boost collagen production, leading to gradual but natural-looking firmness.
Cons and cautions
Slow results
You'll need to use it consistently for several weeks to see visible improvements in fine lines.
Variable effectiveness
The concentration and the rest of the formula matter a lot; a low concentration in a poorly formulated product may not work well.
Best for
- Anyone looking to reduce fine lines and improve skin firmness
- People with sensitive skin who cannot tolerate stronger anti-aging actives like retinol
Use caution if
- Those with known allergies to synthetic peptides (rare)
- People expecting immediate, dramatic results
Usage tips
Safety summary
SH-Polypeptide-26 is considered safe for topical cosmetic use. It has a low irritation and comedogenic risk. No significant safety concerns have been reported in cosmetic concentrations.
Research notes
Clinical studies on signal peptides like SH-Polypeptide-26 show moderate evidence of collagen stimulation and wrinkle reduction over 8-12 weeks. More independent research is needed to confirm long-term efficacy.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- Regulatory status
- Approved as a cosmetic ingredient in the US, EU, and other major markets. Not classified as a drug.
- Common uses
- Anti-aging serums, Eye creams, Firming lotions
- Environmental note
- Synthetically produced, so it does not rely on animal or plant harvesting. Its environmental impact is low compared to some natural extracts.
Good to know
- Peptides are often listed as 'Acetyl Hexapeptide-X' or 'Palmitoyl Oligopeptide' on labels.
- Store peptide products in a cool, dark place to maintain stability.
Common questions
What is SH-Polypeptide-26 in beauty products?
SH-Polypeptide-26 is a short chain of amino acids (the building blocks of protein) made in a lab. When applied to skin, it acts like a messenger, telling skin cells to produce more collagen and elastin. This helps plump the skin and soften the look of wrinkles. It's a gentle ingredient, unlikely to cause irritation, and is often found in anti-aging products.
What does SH-Polypeptide-26 do in a beauty product?
It binds to receptors on skin cells (fibroblasts) and activates signaling pathways that increase the production of collagen and elastin, the structural proteins that keep skin firm and elastic.
Is SH-Polypeptide-26 safe for most people?
SH-Polypeptide-26 is considered safe for topical cosmetic use. It has a low irritation and comedogenic risk. No significant safety concerns have been reported in cosmetic concentrations.
Who should be careful with SH-Polypeptide-26?
Those with known allergies to synthetic peptides (rare) People expecting immediate, dramatic 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.