Ingredient review
SH-Polypeptide-36
INCI: SH-Polypeptide-36
SH-Polypeptide-36 is a synthetic peptide that may help reduce fine lines by signaling skin cells to produce more collagen, but human studies are limited.
In plain English
SH-Polypeptide-36 is a lab-made chain of amino acids (a peptide) designed to mimic natural signals in your skin. When applied in a cream or serum, it tells your skin cells to ramp up collagen production, which can help plump up fine lines and improve firmness over time. Think of it as a gentle messenger that encourages your skin to act younger.
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-36 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-36.
- 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-36 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' because they send specific instructions to skin cells.
How it works
When applied topically, SH-Polypeptide-36 penetrates the outer layer of skin and binds to receptors on fibroblasts (the cells that make collagen). This binding triggers a signaling cascade that increases the production of collagen and other structural proteins, helping to reinforce the skin's support network and reduce the appearance of wrinkles.
Pros
Gentle collagen booster
Unlike harsh exfoliants, SH-Polypeptide-36 works by signaling your skin's own repair processes, making it suitable for sensitive skin types.
Low irritation risk
Clinical reports and ingredient safety reviews indicate a very low rate of irritation or allergic reactions, so it can be used daily without disrupting the skin barrier.
Cons and cautions
Slow, subtle results
You won't see dramatic changes overnight. It typically takes 8–12 weeks of consistent use to notice a visible difference in fine lines.
Limited independent research
Most evidence comes from manufacturer studies or broader peptide research, not large-scale independent human trials specifically for SH-Polypeptide-36.
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
- Anyone with a known allergy or sensitivity to synthetic peptides (rare)
Usage tips
Safety summary
SH-Polypeptide-36 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 the available literature.
Research notes
Research on signal peptides in general supports their ability to stimulate collagen production in vitro and in small human studies. However, specific peer-reviewed clinical trials for SH-Polypeptide-36 are sparse, and most evidence is extrapolated from related peptides or manufacturer data.
Common label clues
- Typical concentration
- Typically used at 0.5% to 2% in leave-on formulations
- Regulatory status
- Approved for cosmetic use in the US, EU, and other major markets. It is not classified as a drug ingredient and does not require FDA pre-market approval.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- As a synthetic peptide, it is produced through chemical synthesis, which typically has a lower environmental footprint than harvesting from natural sources.
Good to know
- Peptides like SH-Polypeptide-36 are often listed near the middle or end of an ingredient list because they are effective at low concentrations.
- This ingredient is not the same as growth factors or hormones—it's a synthetic signal, not a living substance.
Common questions
What is SH-Polypeptide-36 in beauty products?
SH-Polypeptide-36 is a lab-made chain of amino acids (a peptide) designed to mimic natural signals in your skin. When applied in a cream or serum, it tells your skin cells to ramp up collagen production, which can help plump up fine lines and improve firmness over time. Think of it as a gentle messenger that encourages your skin to act younger.
What does SH-Polypeptide-36 do in a beauty product?
When applied topically, SH-Polypeptide-36 penetrates the outer layer of skin and binds to receptors on fibroblasts (the cells that make collagen). This binding triggers a signaling cascade that increases the production of collagen and other structural proteins, helping to reinforce the skin's support network and reduce the appearance of wrinkles.
Is SH-Polypeptide-36 safe for most people?
SH-Polypeptide-36 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 the available literature.
Who should be careful with SH-Polypeptide-36?
Anyone with a known allergy or sensitivity 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.