Ingredient review
SH-Pentapeptide-38
INCI: SH-Pentapeptide-38
A lab-made peptide that signals skin to produce more collagen, helping soften fine lines over time with minimal irritation.
In plain English
SH-Pentapeptide-38 is a small protein fragment (a peptide) made in a lab. When applied to skin, it acts like a messenger, telling skin cells to make more collagen and other supportive proteins. This can help plump the skin and reduce the look of wrinkles, similar to how retinol works but without the irritation. It's commonly 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-Pentapeptide-38 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-Pentapeptide-38.
- 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-Pentapeptide-38 is a synthetic pentapeptide (a chain of five amino acids) designed to mimic a natural collagen fragment that triggers skin repair. It is often used as part of a peptide blend in anti-aging formulations.
How it works
It binds to receptors on fibroblasts (skin cells) and stimulates them to produce more collagen, elastin, and other extracellular matrix components. This helps improve skin firmness and reduce wrinkle depth over weeks of consistent use.
Pros
Gentle anti-aging
Stimulates collagen without the irritation common with retinol or acids, making it ideal for sensitive skin.
Backed by research
Peptides like this have been studied in clinical trials for reducing wrinkle depth and improving skin texture.
Cons and cautions
Slow results
You need to use it daily for several weeks to see visible improvements, and results are subtle compared to stronger actives.
Higher cost
Peptide-based products tend to be more expensive than simpler moisturizers due to the cost of the ingredient.
Best for
- Anyone looking for a gentle anti-aging ingredient
- People with sensitive skin who cannot tolerate retinol
- Those wanting to maintain skin firmness as they age
Use caution if
- Those seeking immediate or dramatic wrinkle reduction
- Individuals allergic to synthetic peptides (rare)
Usage tips
Safety summary
SH-Pentapeptide-38 is considered safe for cosmetic use. It has low irritation and allergy potential. No significant safety concerns have been reported in published literature or regulatory reviews.
Research notes
Clinical studies on similar peptides (e.g., Matrixyl) show improvements in wrinkle depth and skin firmness over 8–12 weeks. Direct studies on SH-Pentapeptide-38 are limited, but the mechanism is well-supported by peptide research.
Common label clues
- Typical concentration
- 0.5% to 2% in leave-on formulas
- 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, Moisturizers, Neck creams
- Environmental note
- Synthetic peptides are produced in labs with minimal environmental impact compared to animal-derived ingredients.
Good to know
- SH-Pentapeptide-38 is often combined with other peptides in products labeled as 'peptide complex'.
- It is stable in most formulations but avoid using with very low pH (under 4) products that may degrade it.
Common questions
What is SH-Pentapeptide-38 in beauty products?
SH-Pentapeptide-38 is a small protein fragment (a peptide) made in a lab. When applied to skin, it acts like a messenger, telling skin cells to make more collagen and other supportive proteins. This can help plump the skin and reduce the look of wrinkles, similar to how retinol works but without the irritation. It's commonly found in anti-aging serums and eye creams.
What does SH-Pentapeptide-38 do in a beauty product?
It binds to receptors on fibroblasts (skin cells) and stimulates them to produce more collagen, elastin, and other extracellular matrix components. This helps improve skin firmness and reduce wrinkle depth over weeks of consistent use.
Is SH-Pentapeptide-38 safe for most people?
SH-Pentapeptide-38 is considered safe for cosmetic use. It has low irritation and allergy potential. No significant safety concerns have been reported in published literature or regulatory reviews.
Who should be careful with SH-Pentapeptide-38?
Those seeking immediate or dramatic wrinkle reduction Individuals allergic 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.