Ingredient review
Nicotinoyl Dipeptide-24
INCI: Nicotinoyl Dipeptide-24
A synthetic peptide that may help improve skin firmness and reduce fine lines, but more human studies are needed.
In plain English
Nicotinoyl Dipeptide-24 is a lab-made peptide (a small chain of amino acids) combined with a form of vitamin B3 (niacin). It's added to skincare products to help support the skin's structure and reduce the look of wrinkles. Think of it as a signal that tells skin cells to produce more collagen and repair themselves.
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
Nicotinoyl Dipeptide-24 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-24.
- 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
A synthetic peptide consisting of two amino acids (dipeptide) linked to a nicotinoyl group (derived from vitamin B3). It is designed to mimic natural signaling molecules in the skin.
How it works
When applied topically, the peptide portion is believed to bind to receptors on skin cells, stimulating collagen production and supporting the extracellular matrix. The nicotinoyl group may enhance stability and delivery, while also providing antioxidant-like benefits.
Pros
Targeted anti-aging support
Designed to specifically signal collagen production, which can help improve skin firmness over time.
Generally well-tolerated
Low irritation and comedogenic risk makes it suitable for most skin types, including sensitive skin.
Cons and cautions
Limited human evidence
Most supporting data comes from lab or animal studies; robust human trials are still scarce.
Premium price point
Synthetic peptides are costly to produce, so products containing them tend to be more expensive.
Best for
- Adults looking to address early signs of aging
- Those with dry or mature skin seeking extra firmness support
Use caution if
- Individuals with known sensitivity to peptides or niacinamide
Usage tips
Safety summary
Nicotinoyl Dipeptide-24 is considered safe for topical use in cosmetics at typical concentrations. Irritation and allergy are rare, but patch testing is recommended for those with sensitive skin.
Research notes
Preclinical studies suggest Nicotinoyl Dipeptide-24 can stimulate collagen synthesis and improve skin firmness. However, independent human clinical trials are limited, and most evidence is from manufacturer-sponsored research.
Common label clues
- Typical concentration
- Typically used at 0.5% to 2% in leave-on products
- 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, Facial moisturizers
- Environmental note
- Synthetic peptides are produced in controlled lab conditions, reducing environmental impact compared to some natural extracts.
Good to know
- Often combined with other peptides or niacinamide for synergistic effects.
- Store products containing peptides away from direct sunlight and heat to maintain stability.
Common questions
What is Nicotinoyl Dipeptide-24 in beauty products?
Nicotinoyl Dipeptide-24 is a lab-made peptide (a small chain of amino acids) combined with a form of vitamin B3 (niacin). It's added to skincare products to help support the skin's structure and reduce the look of wrinkles. Think of it as a signal that tells skin cells to produce more collagen and repair themselves.
What does Nicotinoyl Dipeptide-24 do in a beauty product?
When applied topically, the peptide portion is believed to bind to receptors on skin cells, stimulating collagen production and supporting the extracellular matrix. The nicotinoyl group may enhance stability and delivery, while also providing antioxidant-like benefits.
Is Nicotinoyl Dipeptide-24 safe for most people?
Nicotinoyl Dipeptide-24 is considered safe for topical use in cosmetics at typical concentrations. Irritation and allergy are rare, but patch testing is recommended for those with sensitive skin.
Who should be careful with Nicotinoyl Dipeptide-24?
Individuals with known 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.