Ingredient review
SH-Polypeptide-71
INCI: SH-Polypeptide-71
A synthetic peptide that signals skin cells to produce more collagen, helping reduce fine lines and improve firmness with consistent use.
In plain English
SH-Polypeptide-71 is a lab-made protein fragment (a peptide) that acts like a messenger to your skin cells. When applied in a cream or serum, it tells your skin to make more collagen, which is the protein that keeps skin plump and smooth. Over time, this can help soften fine lines and make skin feel firmer. It's a gentle ingredient, unlikely to cause irritation, and works best when used regularly over weeks or months.
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-71 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-71.
- 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-71 is a synthetic peptide, meaning it's a short chain of amino acids made in a lab. Peptides like this are designed to mimic natural signaling molecules in the skin that trigger collagen production.
How it works
When applied topically, SH-Polypeptide-71 penetrates the outer layer of skin and binds to receptors on fibroblasts (the cells that make collagen). This binding sends a signal to ramp up collagen synthesis, which helps reinforce the skin's structure, reduce the appearance of fine lines, and improve overall firmness and elasticity.
Pros
Gentle anti-aging support
Unlike stronger actives like retinol, SH-Polypeptide-71 is very unlikely to cause irritation, redness, or peeling, making it suitable for sensitive skin.
Targets collagen at the source
It works by directly signaling skin cells to produce more collagen, addressing one of the root causes of visible aging rather than just masking signs.
Cons and cautions
Slow, gradual results
You won't see overnight changes. It typically takes 4 to 12 weeks of daily use before improvements in firmness and wrinkle depth become noticeable.
Effectiveness depends on formulation
The peptide must be properly stabilized and delivered at an effective concentration. A poorly formulated product may not deliver noticeable benefits.
Best for
- Anyone looking to reduce fine lines and improve skin firmness
- People with aging or sun-damaged skin seeking a gentle anti-aging option
Use caution if
- Those with known allergies to synthetic peptides (rare)
Usage tips
Safety summary
SH-Polypeptide-71 is considered safe for cosmetic use. It has a low irritation and comedogenic risk, and no significant safety concerns have been reported in the available literature.
Research notes
Peptides like SH-Polypeptide-71 are supported by studies showing they can stimulate collagen synthesis in skin cells. However, most evidence comes from lab and small clinical studies; larger independent trials are still limited.
Common label clues
- Typical concentration
- Typically 0.1% to 1% in leave-on products
- Regulatory status
- Approved for cosmetic use in the US, EU, and other major markets. It is not a drug ingredient and is not intended to treat or prevent disease.
- 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
- SH-Polypeptide-71 is often listed near the middle or end of an ingredient list because it's effective at low concentrations.
- It can be combined with other peptides or hyaluronic acid for added hydration and anti-aging benefits.
Common questions
What is SH-Polypeptide-71 in beauty products?
SH-Polypeptide-71 is a lab-made protein fragment (a peptide) that acts like a messenger to your skin cells. When applied in a cream or serum, it tells your skin to make more collagen, which is the protein that keeps skin plump and smooth. Over time, this can help soften fine lines and make skin feel firmer. It's a gentle ingredient, unlikely to cause irritation, and works best when used regularly over weeks or months.
What does SH-Polypeptide-71 do in a beauty product?
When applied topically, SH-Polypeptide-71 penetrates the outer layer of skin and binds to receptors on fibroblasts (the cells that make collagen). This binding sends a signal to ramp up collagen synthesis, which helps reinforce the skin's structure, reduce the appearance of fine lines, and improve overall firmness and elasticity.
Is SH-Polypeptide-71 safe for most people?
SH-Polypeptide-71 is considered safe for cosmetic use. It has a low irritation and comedogenic risk, and no significant safety concerns have been reported in the available literature.
Who should be careful with SH-Polypeptide-71?
Those with known allergies to synthetic peptides (rare)
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.