Ingredient review
Nicotinoyl Hexapeptide-45
INCI: Nicotinoyl Hexapeptide-45
A lab-made peptide that may help smooth wrinkles and improve skin firmness, but human studies are still limited.
In plain English
Nicotinoyl Hexapeptide-45 is a synthetic peptide — a short chain of amino acids — that has been modified with a niacin (vitamin B3) group. In skincare, it is added to products aimed at reducing fine lines and improving skin firmness. Because it is a relatively new ingredient, most of the evidence for its effectiveness comes from lab studies rather than large human trials. It is considered gentle and unlikely to cause irritation for most people.
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 Hexapeptide-45 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 Hexapeptide-45.
- 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 fragment (hexapeptide) chemically bonded to a nicotinoyl group, designed to mimic signaling molecules that encourage collagen production in the skin.
How it works
It is thought to penetrate the upper layers of skin and signal fibroblasts to produce more collagen and other structural proteins, which can help plump the skin and reduce the appearance of wrinkles over time.
Pros
Gentle on skin
Nicotinoyl Hexapeptide-45 has a low irritation and comedogenic risk, making it suitable for sensitive skin types that cannot tolerate stronger anti-aging ingredients.
Targets multiple signs of aging
By potentially boosting collagen production, it may help with both fine lines and loss of firmness, offering more than a single-action ingredient.
Cons and cautions
Limited human research
Most evidence comes from lab or animal studies; large, peer-reviewed human trials are scarce, so the real-world effectiveness is not fully established.
Results take time
Like many peptides, visible improvements typically require consistent use over several weeks to months, and results may be subtle.
Best for
- People looking for a gentle anti-aging ingredient with low irritation potential
- Those who want to complement stronger actives like retinol or vitamin C
Use caution if
- Anyone with a known allergy or sensitivity to peptides or niacinamide
Usage tips
Safety summary
Nicotinoyl Hexapeptide-45 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
Evidence is primarily from in vitro and ex vivo studies suggesting collagen-stimulating activity. Human clinical data are limited, and more rigorous studies are needed to confirm efficacy.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- Regulatory status
- Approved as a cosmetic ingredient in most regions including the EU and US; no specific restrictions at typical use levels.
- Common uses
- Anti-aging serums, Eye creams, Facial moisturizers
- Environmental note
- As a synthetic peptide, it is produced through chemical synthesis, which has a lower environmental footprint compared to some animal-derived ingredients.
Good to know
- Peptides are often combined with other anti-aging ingredients like niacinamide or hyaluronic acid for enhanced benefits.
- The 'nicotinoyl' modification may improve the peptide's stability and skin absorption.
Common questions
What is Nicotinoyl Hexapeptide-45 in beauty products?
Nicotinoyl Hexapeptide-45 is a synthetic peptide — a short chain of amino acids — that has been modified with a niacin (vitamin B3) group. In skincare, it is added to products aimed at reducing fine lines and improving skin firmness. Because it is a relatively new ingredient, most of the evidence for its effectiveness comes from lab studies rather than large human trials. It is considered gentle and unlikely to cause irritation for most people.
What does Nicotinoyl Hexapeptide-45 do in a beauty product?
It is thought to penetrate the upper layers of skin and signal fibroblasts to produce more collagen and other structural proteins, which can help plump the skin and reduce the appearance of wrinkles over time.
Is Nicotinoyl Hexapeptide-45 safe for most people?
Nicotinoyl Hexapeptide-45 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 Nicotinoyl Hexapeptide-45?
Anyone with a known allergy or sensitivity to peptides or niacinamide
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.