Ingredient review
SH-Polypeptide-48
INCI: SH-Polypeptide-48
A synthetic peptide that may help reduce fine lines and improve skin firmness, but more human studies are needed to confirm its effects.
In plain English
SH-Polypeptide-48 is a lab-made protein fragment designed to signal your 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, and it's generally well-tolerated by most skin types.
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-48 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-48.
- 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-48 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 signaling peptides, which are designed to mimic natural peptides in the skin that trigger repair and regeneration processes.
How it works
When applied topically, SH-Polypeptide-48 is believed to bind to receptors on skin cells, sending a signal to increase the production of collagen, elastin, and other structural proteins. This can help improve skin firmness, reduce the appearance of fine lines and wrinkles, and support overall skin structure over time.
Pros
Gentle on skin
SH-Polypeptide-48 has a low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin types.
Targeted anti-aging support
It specifically signals collagen production, which can help improve skin firmness and reduce fine lines over time.
Cons and cautions
Slow to show results
Peptides like SH-Polypeptide-48 require consistent use over several weeks to months before visible improvements appear.
Limited human data
While the mechanism is promising, there are fewer published human studies on this specific peptide compared to more established ones like Matrixyl.
Best for
- Anyone looking to support anti-aging skincare routines
- People with fine lines or loss of firmness who want a gentle, non-irritating option
Use caution if
- Those with known allergies to synthetic peptides (rare)
- Individuals seeking immediate results — peptides require consistent, long-term use
Usage tips
Safety summary
SH-Polypeptide-48 is considered safe for 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
The mechanism of signaling peptides is well-established in skincare science, but specific clinical data for SH-Polypeptide-48 is limited. Most evidence comes from ingredient supplier studies and broader peptide research.
Common label clues
- Typical concentration
- Typically used at 0.5% to 2% in leave-on formulations
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. Not classified as a drug or medicine.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- As a synthetic peptide, it is produced in controlled laboratory conditions, which reduces the environmental impact associated with harvesting natural ingredients.
Good to know
- Peptides are fragile — avoid using them with very low pH products (like strong AHAs) in the same routine.
- SH-Polypeptide-48 is often combined with other peptides for a synergistic effect.
Common questions
What is SH-Polypeptide-48 in beauty products?
SH-Polypeptide-48 is a lab-made protein fragment designed to signal your 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, and it's generally well-tolerated by most skin types.
What does SH-Polypeptide-48 do in a beauty product?
When applied topically, SH-Polypeptide-48 is believed to bind to receptors on skin cells, sending a signal to increase the production of collagen, elastin, and other structural proteins. This can help improve skin firmness, reduce the appearance of fine lines and wrinkles, and support overall skin structure over time.
Is SH-Polypeptide-48 safe for most people?
SH-Polypeptide-48 is considered safe for 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-48?
Those with known allergies to synthetic peptides (rare) Individuals seeking immediate results — peptides require consistent, long-term use
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.