Ingredient review
SH-Polypeptide-13
INCI: SH-Polypeptide-13
A synthetic peptide that may help reduce fine lines and improve skin firmness, but human studies are limited.
In plain English
SH-Polypeptide-13 is a lab-made protein fragment that signals your skin to produce more collagen and elastin, the building blocks that keep skin plump and firm. Think of it as a tiny messenger that tells your skin cells to act younger. It's often found in anti-aging serums and eye creams.
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-13 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-13.
- 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-13 is a synthetic peptide, meaning it's a short chain of amino acids made in a lab. It is designed to mimic naturally occurring signaling peptides in the skin that stimulate collagen production.
How it works
When applied topically, SH-Polypeptide-13 penetrates the outer layer of skin and binds to receptors on fibroblasts (the cells that make collagen). This binding triggers a cascade of signals that increase the production of collagen and elastin, leading to firmer, more resilient skin over time.
Pros
Gentle on skin
SH-Polypeptide-13 has a low irritation risk and is generally well-tolerated, even for sensitive skin types.
Targets aging at a cellular level
It works by signaling skin cells to produce more collagen and elastin, addressing the root cause of fine lines and sagging.
Cons and cautions
Slow to show results
Peptides like SH-Polypeptide-13 require consistent use over several weeks to months before visible improvements appear.
Limited human evidence
Most supporting research comes from lab studies or small trials; large-scale human studies are lacking.
Best for
- Adults looking for gentle anti-aging support
- Those with fine lines and loss of firmness
- People who prefer synthetic, non-irritating ingredients
Use caution if
- Anyone with known peptide allergies (rare)
- Those expecting instant results
Usage tips
Safety summary
SH-Polypeptide-13 is considered safe for topical use in cosmetics at typical concentrations. Irritation and allergic reactions are rare. As with any new ingredient, a patch test is recommended.
Research notes
Evidence for SH-Polypeptide-13 is moderate, with in vitro studies showing collagen stimulation and small human trials suggesting improvements in skin firmness and wrinkle depth. Larger, independent studies are needed to confirm efficacy.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. Not classified as a drug.
- Common uses
- Anti-aging serums, Eye creams, Firming lotions
- Environmental note
- Synthetic peptides are produced in labs, which reduces the need for animal-derived or plant-based raw materials, but their production involves chemical synthesis and purification steps.
Good to know
- Peptides are often listed as 'polypeptide' followed by a number on ingredient labels.
- SH-Polypeptide-13 is stable in most formulations but can degrade if exposed to extreme pH or high heat.
Common questions
What is SH-Polypeptide-13 in beauty products?
SH-Polypeptide-13 is a lab-made protein fragment that signals your skin to produce more collagen and elastin, the building blocks that keep skin plump and firm. Think of it as a tiny messenger that tells your skin cells to act younger. It's often found in anti-aging serums and eye creams.
What does SH-Polypeptide-13 do in a beauty product?
When applied topically, SH-Polypeptide-13 penetrates the outer layer of skin and binds to receptors on fibroblasts (the cells that make collagen). This binding triggers a cascade of signals that increase the production of collagen and elastin, leading to firmer, more resilient skin over time.
Is SH-Polypeptide-13 safe for most people?
SH-Polypeptide-13 is considered safe for topical use in cosmetics at typical concentrations. Irritation and allergic reactions are rare. As with any new ingredient, a patch test is recommended.
Who should be careful with SH-Polypeptide-13?
Anyone with known peptide allergies (rare) Those expecting instant 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.