Ingredient review
SH-Polypeptide-35
INCI: SH-Polypeptide-35
A lab-made peptide that may help support collagen and improve skin firmness, but more human studies are needed to confirm its effects.
In plain English
SH-Polypeptide-35 is a short chain of amino acids (a peptide) made in a lab. In skincare, peptides like this are added to products to signal skin cells to produce more collagen and elastin, which can help reduce fine lines and make skin feel firmer. Think of it as a tiny messenger that tells your skin to act younger. It's generally gentle and well-tolerated.
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-35 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-35.
- 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-35 is a synthetic peptide, meaning it's a man-made chain of amino acids designed to mimic natural signaling molecules in the skin. It is a specific sequence (35) of the 'SH' (synthetic hexapeptide) family, often used in anti-aging formulations.
How it works
When applied topically, SH-Polypeptide-35 is thought to penetrate the outer layer of skin and interact with fibroblasts (the cells that make collagen). It may stimulate these cells to produce more collagen and other structural proteins, helping to improve skin firmness and reduce the appearance of wrinkles over time. It works as a signaling agent, not a filler.
Pros
Gentle on skin
SH-Polypeptide-35 has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin.
Targets collagen support
It is designed to signal skin cells to produce more collagen, which can help improve skin firmness and reduce fine lines over time.
Cons and cautions
Limited evidence
There are few published human studies specifically on SH-Polypeptide-35, so its effectiveness is less established compared to more researched peptides.
Gradual results
Peptides work slowly; you may need to use a product consistently for several weeks to notice any subtle improvement in skin texture or firmness.
Best for
- Adults looking for a gentle anti-aging ingredient to support skin firmness
- Those with sensitive skin who want a low-irritation peptide option
Use caution if
- Anyone allergic to any peptide ingredient (rare)
- Those expecting immediate or dramatic wrinkle reversal
Usage tips
Safety summary
SH-Polypeptide-35 is considered safe for topical cosmetic use. It has low irritation and comedogenic potential. However, as with any new ingredient, perform a patch test before widespread use. There are no known serious safety concerns.
Research notes
Research on SH-Polypeptide-35 specifically is limited. Most evidence comes from general peptide studies and manufacturer data. While peptides as a class have shown promise in supporting collagen synthesis, more independent human clinical trials are needed to confirm the specific benefits of SH-Polypeptide-35.
Common label clues
- Typical concentration
- Typically 0.5% to 2% in leave-on products
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. It is not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- As a synthetic peptide, it is produced in controlled lab conditions, which reduces the environmental impact compared to harvesting from natural sources.
Good to know
- Peptides are often listed near the end of ingredient lists because they are effective at low concentrations.
- SH-Polypeptide-35 is not the same as copper peptides or Matrixyl; each peptide has a different sequence and function.
Common questions
What is SH-Polypeptide-35 in beauty products?
SH-Polypeptide-35 is a short chain of amino acids (a peptide) made in a lab. In skincare, peptides like this are added to products to signal skin cells to produce more collagen and elastin, which can help reduce fine lines and make skin feel firmer. Think of it as a tiny messenger that tells your skin to act younger. It's generally gentle and well-tolerated.
What does SH-Polypeptide-35 do in a beauty product?
When applied topically, SH-Polypeptide-35 is thought to penetrate the outer layer of skin and interact with fibroblasts (the cells that make collagen). It may stimulate these cells to produce more collagen and other structural proteins, helping to improve skin firmness and reduce the appearance of wrinkles over time. It works as a signaling agent, not a filler.
Is SH-Polypeptide-35 safe for most people?
SH-Polypeptide-35 is considered safe for topical cosmetic use. It has low irritation and comedogenic potential. However, as with any new ingredient, perform a patch test before widespread use. There are no known serious safety concerns.
Who should be careful with SH-Polypeptide-35?
Anyone allergic to any peptide ingredient (rare) Those expecting immediate or dramatic wrinkle reversal
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.