Ingredient review
SH-Polypeptide-49
INCI: SH-Polypeptide-49
SH-Polypeptide-49 is a lab-made peptide that may help support skin firmness and smooth fine lines, but research is still emerging and results vary.
In plain English
SH-Polypeptide-49 is a short chain of amino acids (the building blocks of protein) made in a lab. When applied to skin, it's thought to signal skin cells to produce more collagen and elastin, which are proteins that keep skin plump and firm. Think of it as a tiny messenger that tells your skin to act younger. Because it's a synthetic peptide, it's designed to be stable and effective in skincare formulas, but it's still a newer ingredient, so long-term data is limited.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
SH-Polypeptide-49 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-49.
- 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
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
SH-Polypeptide-49 is a synthetic peptide, specifically a hexapeptide (made of six amino acids), engineered to mimic naturally occurring signaling peptides in the skin. It is produced through chemical synthesis, ensuring purity and consistency.
How it works
In a cosmetic product, SH-Polypeptide-49 is believed to bind to receptors on skin cells and stimulate the production of collagen and other extracellular matrix proteins. This can help improve skin firmness, elasticity, and reduce the depth of fine lines over time with consistent use.
Pros
Gentle on skin
SH-Polypeptide-49 has a low irritation and comedogenic risk, making it suitable for sensitive skin types and around the delicate eye area.
Targets aging signs
It specifically aims to support collagen production, which can help improve skin firmness and smooth fine lines over time.
Cons and cautions
Limited research
There are few peer-reviewed studies specifically on SH-Polypeptide-49, so the evidence for its effectiveness is less robust than for more established peptides.
Subtle results
Users may need to wait several weeks or months to see noticeable improvements, and results are typically modest compared to retinoids or professional treatments.
Best for
- Adults looking for a gentle anti-aging ingredient to support skin firmness
- Those with sensitive skin who want a low-irritation option for fine lines
Use caution if
- Anyone seeking immediate or dramatic wrinkle reduction (peptides work gradually)
- Those with very severe skin laxity who may need more intensive treatments
Usage tips
Safety summary
SH-Polypeptide-49 is considered safe for topical cosmetic use with a low risk of irritation or allergic reactions. There are no known significant safety concerns, but as with any new ingredient, a patch test is recommended for first-time users.
Research notes
Research on SH-Polypeptide-49 specifically is limited. It belongs to a class of synthetic peptides that have shown promise in stimulating collagen synthesis in vitro and in small clinical studies. More large-scale, peer-reviewed human trials are needed to confirm its efficacy.
Common label clues
- Typical concentration
- Typically used at 0.5% to 2% in leave-on formulations
- Regulatory status
- In the US, SH-Polypeptide-49 is regulated as a cosmetic ingredient and is not subject to FDA pre-market approval. It is generally considered safe for topical use when formulated appropriately.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- As a synthetic peptide, its production involves chemical synthesis, which may have a moderate environmental footprint compared to naturally sourced ingredients. However, it is used in low concentrations.
Good to know
- Peptides work best when combined with other anti-aging ingredients like antioxidants (vitamin C) and sunscreen.
- SH-Polypeptide-49 is water-soluble and typically found in serum or gel-based formulas.
Common questions
What is SH-Polypeptide-49 in beauty products?
SH-Polypeptide-49 is a short chain of amino acids (the building blocks of protein) made in a lab. When applied to skin, it's thought to signal skin cells to produce more collagen and elastin, which are proteins that keep skin plump and firm. Think of it as a tiny messenger that tells your skin to act younger. Because it's a synthetic peptide, it's designed to be stable and effective in skincare formulas, but it's still a newer ingredient, so long-term data is limited.
What does SH-Polypeptide-49 do in a beauty product?
In a cosmetic product, SH-Polypeptide-49 is believed to bind to receptors on skin cells and stimulate the production of collagen and other extracellular matrix proteins. This can help improve skin firmness, elasticity, and reduce the depth of fine lines over time with consistent use.
Is SH-Polypeptide-49 safe for most people?
SH-Polypeptide-49 is considered safe for topical cosmetic use with a low risk of irritation or allergic reactions. There are no known significant safety concerns, but as with any new ingredient, a patch test is recommended for first-time users.
Who should be careful with SH-Polypeptide-49?
Anyone seeking immediate or dramatic wrinkle reduction (peptides work gradually) Those with very severe skin laxity who may need more intensive treatments
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.