Ingredient review
Nicotinoyl SH-Pentapeptide-19
INCI: Nicotinoyl SH-Pentapeptide-19
A lab-made peptide-niacin hybrid that aims to firm skin and soften wrinkles, but human studies are still limited.
In plain English
This ingredient is a man-made molecule that links a small protein fragment (a peptide) with a form of vitamin B3 (niacin). In skincare, it's meant to encourage your skin to produce more collagen and other supportive proteins, which can help the skin feel firmer and look smoother over time. Because it's a newer ingredient, most of the evidence comes from lab tests rather than large human studies.
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
Nicotinoyl SH-Pentapeptide-19 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 Nicotinoyl SH-Pentapeptide-19.
- 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
A synthetic peptide (a short chain of amino acids) that has been chemically bonded to a nicotinoyl group (derived from niacin, a form of vitamin B3). This combination is designed to deliver both peptide signaling and niacin benefits in one molecule.
How it works
Once applied to the skin, the peptide portion is thought to mimic natural signaling molecules that tell skin cells to produce more collagen and elastin. The nicotinoyl part may support the skin's barrier and reduce inflammation. Together, they aim to improve skin firmness and reduce the look of fine lines.
Pros
Dual-action molecule
Combines peptide signaling with niacin's barrier-supporting properties in one ingredient, potentially offering more than a single-function peptide.
Low irritation risk
Most users tolerate it well, making it a good option for sensitive skin types that react to stronger anti-aging actives like retinol.
Cons and cautions
Limited human research
Most evidence comes from lab studies or small trials; large, independent human studies are still scarce, so claims should be taken with caution.
Gradual results
Like most peptides, visible improvements in firmness or wrinkles typically take weeks to months of consistent use, and results are subtle.
Best for
- People looking for a gentle anti-aging ingredient
- Those with sensitive skin who want to try peptides
Use caution if
- Anyone with a known allergy to niacin or peptides
- Those seeking immediate or dramatic results (peptides work gradually)
Usage tips
Safety summary
Nicotinoyl SH-Pentapeptide-19 is considered safe for topical use at typical cosmetic concentrations. Irritation and allergy are rare. As with any new ingredient, patch testing is recommended for first-time users.
Research notes
Research is primarily in vitro (lab studies) showing collagen stimulation. Human studies are limited but suggest good tolerability and potential for mild firming effects. More independent clinical trials are needed to confirm efficacy.
Common label clues
- Typical concentration
- Typically 0.5% to 2% in leave-on products
- Regulatory status
- Approved for cosmetic use in the EU, US, and other major markets; not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Eye creams, Firming lotions
- Environmental note
- Synthetically produced, so it does not rely on animal or plant harvesting; environmental impact is tied to manufacturing processes.
Good to know
- This ingredient is often found in premium anti-aging serums and eye treatments.
- It pairs well with other peptides and antioxidants but avoid using with very low pH formulas (below pH 4) which may degrade the peptide.
Common questions
What is Nicotinoyl SH-Pentapeptide-19 in beauty products?
This ingredient is a man-made molecule that links a small protein fragment (a peptide) with a form of vitamin B3 (niacin). In skincare, it's meant to encourage your skin to produce more collagen and other supportive proteins, which can help the skin feel firmer and look smoother over time. Because it's a newer ingredient, most of the evidence comes from lab tests rather than large human studies.
What does Nicotinoyl SH-Pentapeptide-19 do in a beauty product?
Once applied to the skin, the peptide portion is thought to mimic natural signaling molecules that tell skin cells to produce more collagen and elastin. The nicotinoyl part may support the skin's barrier and reduce inflammation. Together, they aim to improve skin firmness and reduce the look of fine lines.
Is Nicotinoyl SH-Pentapeptide-19 safe for most people?
Nicotinoyl SH-Pentapeptide-19 is considered safe for topical use at typical cosmetic concentrations. Irritation and allergy are rare. As with any new ingredient, patch testing is recommended for first-time users.
Who should be careful with Nicotinoyl SH-Pentapeptide-19?
Anyone with a known allergy to niacin or peptides Those seeking immediate or dramatic results (peptides work gradually)
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.