Ingredient review

SH-Polypeptide-64

INCI: SH-Polypeptide-64

A synthetic peptide that may help reduce fine lines and support firmer-looking skin, but human studies are limited.

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In plain English

SH-Polypeptide-64 is a lab-made chain of amino acids (the building blocks of protein) designed to signal skin cells to produce more collagen. In simple terms, it tells your skin to act younger and repair itself, which can help soften the look of fine lines and improve firmness over time. It's a gentle ingredient, unlikely to cause irritation, and is often found in anti-aging serums and creams.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

SH-Polypeptide-64 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging SH-Polypeptide-64.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

SH-Polypeptide-64 is a synthetic peptide, meaning it's a short chain of amino acids created in a laboratory. Peptides like this are designed to mimic natural signaling molecules in the skin that trigger collagen production and other repair processes.

How it works

When applied topically, SH-Polypeptide-64 is thought to penetrate the outer layer of skin and bind to specific receptors on fibroblasts (collagen-producing cells). This binding sends a signal to increase collagen and elastin synthesis, which can help plump the skin and reduce the appearance of wrinkles. It also may support the skin's natural repair mechanisms.

Pros

Gentle anti-aging support

Unlike strong exfoliants or retinoids, SH-Polypeptide-64 works by signaling skin cells without causing peeling or irritation, making it suitable for sensitive skin.

Targets collagen production

It directly encourages your skin to produce more collagen, which can lead to firmer, plumper skin over time—a key benefit for aging or sun-damaged skin.

Cons and cautions

Gradual results

You won't see dramatic changes overnight. It typically takes 4–12 weeks of daily use to notice visible improvements in fine lines and firmness.

Limited human research

While the concept is well-supported, specific peer-reviewed human studies on SH-Polypeptide-64 are scarce, so the evidence is mostly based on similar peptides and lab data.

Best for

  • Adults looking for a gentle anti-aging ingredient to soften fine lines
  • Those with sensitive skin who cannot tolerate stronger actives like retinol

Use caution if

  • People with known allergies to synthetic peptides (rare)

Usage tips

Apply after cleansing and before heavier creams to allow better absorption.
Use consistently twice daily for best results, and pair with a moisturizer and sunscreen.
Store products containing peptides in a cool, dark place to maintain stability.

Safety summary

SH-Polypeptide-64 is considered safe for topical cosmetic use at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin. No significant safety concerns have been reported in available literature.

Research notes

The anti-aging benefits of signal peptides are supported by in vitro and some clinical studies on similar peptides, but specific human trials for SH-Polypeptide-64 are limited. The evidence is moderate, with most support coming from the broader peptide family.

Common label clues

Typical concentration
Typically used at 0.1% to 1% in leave-on products
Regulatory status
Approved as a cosmetic ingredient in the US, EU, and other major markets. It is not classified as a drug and cannot claim to treat or cure skin diseases.
Common uses
Anti-aging serums, Firming creams, Eye treatments
Environmental note
As a synthetic peptide, it is produced in controlled lab conditions, which reduces environmental impact compared to harvesting from natural sources. However, its biodegradability is not well-documented.

Good to know

  • Peptides are often listed as 'palmitoyl' something—SH-Polypeptide-64 is a different type, but still works as a signal peptide.
  • It can be used alongside hyaluronic acid and niacinamide for added hydration and barrier support.

Common questions

What is SH-Polypeptide-64 in beauty products?

SH-Polypeptide-64 is a lab-made chain of amino acids (the building blocks of protein) designed to signal skin cells to produce more collagen. In simple terms, it tells your skin to act younger and repair itself, which can help soften the look of fine lines and improve firmness over time. It's a gentle ingredient, unlikely to cause irritation, and is often found in anti-aging serums and creams.

What does SH-Polypeptide-64 do in a beauty product?

When applied topically, SH-Polypeptide-64 is thought to penetrate the outer layer of skin and bind to specific receptors on fibroblasts (collagen-producing cells). This binding sends a signal to increase collagen and elastin synthesis, which can help plump the skin and reduce the appearance of wrinkles. It also may support the skin's natural repair mechanisms.

Is SH-Polypeptide-64 safe for most people?

SH-Polypeptide-64 is considered safe for topical cosmetic use at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin. No significant safety concerns have been reported in available literature.

Who should be careful with SH-Polypeptide-64?

People with known allergies to synthetic peptides (rare)

Research sources

Cosmetic Ingredient Review (CIR) - Safety of PeptidesOpenPubMed - Peptides in CosmeticsOpenINCI Database - SH-Polypeptide-64Open

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.