Ingredient review
SH-Polypeptide-103
INCI: SH-Polypeptide-103
A synthetic peptide that may help reduce fine lines and support firmer-looking skin, but more human studies are needed to confirm its effects.
In plain English
SH-Polypeptide-103 is a lab-made protein fragment (peptide) that skincare products use to signal skin cells to produce more collagen and elastin. Think of it as a tiny messenger that tells your skin to act younger. It's often found in anti-aging serums and creams aimed at smoothing wrinkles and improving firmness.
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-103 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-103.
- 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-103 is a synthetic peptide, meaning it's a short chain of amino acids created in a laboratory. It belongs to a class of ingredients called signal peptides, which are designed to mimic natural peptides in the skin that trigger collagen production.
How it works
When applied topically, SH-Polypeptide-103 is thought to penetrate the outer layer of skin and bind to receptors on fibroblasts (the cells that make collagen). This binding sends a signal to increase collagen and elastin synthesis, which can help plump the skin and reduce the appearance of fine lines and wrinkles over time.
Pros
Gentle on skin
SH-Polypeptide-103 has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin.
Targets aging at the source
By signaling collagen production, it addresses the underlying structural changes that cause wrinkles, rather than just hydrating the surface.
Cons and cautions
Modest evidence
While peptide technology is promising, SH-Polypeptide-103 lacks the extensive peer-reviewed human studies that some other peptides have, so its effectiveness is less certain.
Slow results
Like most anti-aging peptides, benefits take weeks to months of consistent use to become noticeable, and results are typically subtle.
Best for
- Adults looking to address early signs of aging like fine lines
- Those seeking a gentle anti-aging ingredient that works well with other actives
Use caution if
- Individuals with known allergies to synthetic peptides (rare)
Usage tips
Safety summary
SH-Polypeptide-103 is considered safe for topical cosmetic use at typical concentrations. It has low irritation and comedogenic potential, and no significant safety concerns have been reported in available literature.
Research notes
Peptides like SH-Polypeptide-103 are supported by in vitro studies showing collagen stimulation, but human clinical data specific to this peptide is limited. Evidence is moderate and largely extrapolated from broader peptide research.
Common label clues
- Typical concentration
- Typically used at 0.1% to 2% in leave-on products
- Regulatory status
- Approved for cosmetic use in most regions including the EU, US, and Asia. 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 environmental impact compared to animal-derived ingredients.
Good to know
- Peptides work best when combined with other anti-aging ingredients like antioxidants (vitamin C) and sunscreens.
- SH-Polypeptide-103 is often listed near the middle or end of ingredient lists due to low use concentrations.
Common questions
What is SH-Polypeptide-103 in beauty products?
SH-Polypeptide-103 is a lab-made protein fragment (peptide) that skincare products use to signal skin cells to produce more collagen and elastin. Think of it as a tiny messenger that tells your skin to act younger. It's often found in anti-aging serums and creams aimed at smoothing wrinkles and improving firmness.
What does SH-Polypeptide-103 do in a beauty product?
When applied topically, SH-Polypeptide-103 is thought to penetrate the outer layer of skin and bind to receptors on fibroblasts (the cells that make collagen). This binding sends a signal to increase collagen and elastin synthesis, which can help plump the skin and reduce the appearance of fine lines and wrinkles over time.
Is SH-Polypeptide-103 safe for most people?
SH-Polypeptide-103 is considered safe for topical cosmetic use at typical concentrations. It has low irritation and comedogenic potential, and no significant safety concerns have been reported in available literature.
Who should be careful with SH-Polypeptide-103?
Individuals 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.