Ingredient review
SH-Polypeptide-37
INCI: SH-Polypeptide-37
SH-Polypeptide-37 is a lab-made peptide that signals skin cells to produce more collagen, helping reduce fine lines and improve firmness with consistent use.
In plain English
SH-Polypeptide-37 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 your skin cells to ramp up collagen production. Collagen is the protein that keeps skin plump and smooth, but it naturally declines with age. This peptide helps counteract that loss, leading to firmer, less wrinkled skin over time. It's a gentle ingredient suitable for most skin types.
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-37 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-37.
- 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
SH-Polypeptide-37 is a synthetic peptide, meaning it's a small protein fragment created in a laboratory. It belongs to a class of ingredients called signal peptides, which are designed to mimic natural peptides that trigger collagen synthesis in the skin.
How it works
SH-Polypeptide-37 works by binding to receptors on skin cells (fibroblasts) and sending a signal to increase the production of collagen and other extracellular matrix proteins. This helps rebuild the skin's structural support, leading to improved firmness, elasticity, and a reduction in the appearance of fine lines and wrinkles.
Pros
Collagen booster
Directly signals skin cells to produce more collagen, helping maintain a youthful structure over time.
Gentle on skin
Unlike some anti-aging ingredients, it rarely causes irritation, redness, or peeling, making it suitable for sensitive skin.
Cons and cautions
Slow results
You'll need to use it consistently for at least 8–12 weeks before seeing noticeable improvements in firmness and lines.
Limited potency
For deep wrinkles or significant sagging, peptides alone may not be enough; they work best as part of a broader anti-aging routine.
Best for
- Anyone looking to reduce early signs of aging like fine lines and loss of firmness
- People with sensitive skin who cannot tolerate stronger anti-aging actives like retinoids
Use caution if
- Those seeking immediate or dramatic wrinkle reduction
Usage tips
Safety summary
SH-Polypeptide-37 is considered safe for cosmetic use. It has a low risk of irritation and is not known to be comedogenic. No significant safety concerns have been reported in the available literature.
Research notes
Research on signal peptides, including SH-Polypeptide-37, shows they can effectively stimulate collagen synthesis in vitro (in lab studies). Human clinical studies on similar peptides demonstrate improvements in skin firmness and wrinkle reduction with consistent use over several weeks. However, direct peer-reviewed studies on this specific peptide are limited.
Common label clues
- Typical concentration
- Typically used at 0.5% to 2% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the US, EU, and other major markets. It is not a drug and does not require FDA pre-market approval.
- 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 like SH-Polypeptide-37 are often listed near the middle or end of ingredient lists because they are effective at low concentrations.
- This ingredient is stable in most formulations but can be degraded by very low pH (acidic) products.
Common questions
What is SH-Polypeptide-37 in beauty products?
SH-Polypeptide-37 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 your skin cells to ramp up collagen production. Collagen is the protein that keeps skin plump and smooth, but it naturally declines with age. This peptide helps counteract that loss, leading to firmer, less wrinkled skin over time. It's a gentle ingredient suitable for most skin types.
What does SH-Polypeptide-37 do in a beauty product?
SH-Polypeptide-37 works by binding to receptors on skin cells (fibroblasts) and sending a signal to increase the production of collagen and other extracellular matrix proteins. This helps rebuild the skin's structural support, leading to improved firmness, elasticity, and a reduction in the appearance of fine lines and wrinkles.
Is SH-Polypeptide-37 safe for most people?
SH-Polypeptide-37 is considered safe for cosmetic use. It has a low risk of irritation and is not known to be comedogenic. No significant safety concerns have been reported in the available literature.
Who should be careful with SH-Polypeptide-37?
Those seeking immediate or dramatic 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.