Ingredient review
Nicotinoyl Dipeptide-26
INCI: Nicotinoyl Dipeptide-26
A synthetic peptide that may help reduce fine lines and improve skin firmness, but human studies are limited.
In plain English
Nicotinoyl Dipeptide-26 is a lab-made ingredient that combines a small protein fragment (a dipeptide) with a form of vitamin B3 (niacinamide). In skincare, it's designed to signal skin cells to produce more collagen and elastin, which can help smooth wrinkles and firm the skin over time. Because it's a newer ingredient, most evidence comes from lab tests rather than large human studies, so results can vary.
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 Dipeptide-26 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 Dipeptide-26.
- 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 chain of two amino acids) chemically linked to a nicotinoyl group, which is related to niacinamide (vitamin B3). It is designed to be stable and penetrate the skin to deliver anti-aging benefits.
How it works
Once applied, the peptide portion is thought to mimic natural signaling molecules that tell skin cells to boost collagen and elastin production. The nicotinoyl group may enhance absorption and provide additional antioxidant-like support. Over weeks of consistent use, this can lead to firmer, smoother skin with fewer visible fine lines.
Pros
Gentle anti-aging support
Nicotinoyl Dipeptide-26 is unlikely to cause irritation, making it suitable for sensitive skin types that react to stronger actives like retinol or acids.
Pairs well with other ingredients
It can be layered with moisturizers, sunscreens, and other serums without causing pilling or negative reactions, so it fits easily into most routines.
Cons and cautions
Limited human research
Most evidence for this peptide comes from lab studies or small trials, so its real-world anti-aging benefits are not as well-documented as those for retinol or vitamin C.
Higher price point
Products containing this peptide tend to be more expensive than those with more common anti-aging ingredients, which may not be justified for everyone.
Best for
- People looking for a gentle anti-aging ingredient that pairs well with other actives
- Those with sensitive skin who cannot tolerate stronger anti-aging ingredients like retinol
Use caution if
- Anyone with a known allergy or sensitivity to peptides or niacinamide (rare)
Usage tips
Safety summary
Nicotinoyl Dipeptide-26 is considered safe for topical use at typical concentrations. It has low irritation and comedogenic potential. As with any new ingredient, patch testing is recommended for those with very sensitive skin.
Research notes
Research on Nicotinoyl Dipeptide-26 is still emerging. In vitro studies suggest it can stimulate collagen synthesis, but large-scale human clinical trials are lacking. Most evidence is from manufacturer-sponsored studies.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Anti-aging serums, Eye creams, Moisturizers
- Environmental note
- Synthetically produced, so it does not rely on plant harvesting. Its environmental impact is minimal but not extensively studied.
Good to know
- Nicotinoyl Dipeptide-26 is often listed near the middle or end of ingredient lists because it is used at low concentrations.
- It is not the same as pure niacinamide, though it shares a similar chemical group.
Common questions
What is Nicotinoyl Dipeptide-26 in beauty products?
Nicotinoyl Dipeptide-26 is a lab-made ingredient that combines a small protein fragment (a dipeptide) with a form of vitamin B3 (niacinamide). In skincare, it's designed to signal skin cells to produce more collagen and elastin, which can help smooth wrinkles and firm the skin over time. Because it's a newer ingredient, most evidence comes from lab tests rather than large human studies, so results can vary.
What does Nicotinoyl Dipeptide-26 do in a beauty product?
Once applied, the peptide portion is thought to mimic natural signaling molecules that tell skin cells to boost collagen and elastin production. The nicotinoyl group may enhance absorption and provide additional antioxidant-like support. Over weeks of consistent use, this can lead to firmer, smoother skin with fewer visible fine lines.
Is Nicotinoyl Dipeptide-26 safe for most people?
Nicotinoyl Dipeptide-26 is considered safe for topical use at typical concentrations. It has low irritation and comedogenic potential. As with any new ingredient, patch testing is recommended for those with very sensitive skin.
Who should be careful with Nicotinoyl Dipeptide-26?
Anyone with a known allergy or sensitivity to peptides or niacinamide (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.