Ingredient review
Myristoyl Pentapeptide-14
INCI: MYRISTOYL PENTAPEPTIDE-14
A synthetic peptide that may help improve skin firmness and reduce fine lines, with low irritation potential.
In plain English
Myristoyl Pentapeptide-14 is a lab-made protein fragment (peptide) that signals skin cells to produce more collagen and elastin, the building blocks that keep skin plump and firm. Think of it as a tiny messenger that tells your skin to act younger. It's often used in anti-aging products at very low concentrations.
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
Myristoyl Pentapeptide-14 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 Myristoyl Pentapeptide-14.
- 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 pentapeptide (a chain of five amino acids) attached to a myristoyl fatty acid chain, which helps it penetrate the skin more easily. It belongs to a class of ingredients called 'signal peptides' that mimic natural skin peptides.
How it works
Once applied, the myristoyl group helps the peptide absorb into the upper layers of skin. There, it binds to receptors on fibroblasts (collagen-making cells) and stimulates them to produce more collagen and elastin. Over time, this can help improve skin firmness and reduce the appearance of fine lines and wrinkles.
Pros
Gentle on skin
Myristoyl Pentapeptide-14 has a low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin types.
Targets collagen production
It directly signals skin cells to produce more collagen, which can help improve skin firmness and elasticity over time.
Cons and cautions
Slow results
Visible improvements in fine lines and firmness typically take 4–12 weeks of consistent use, so patience is required.
Variable effectiveness
The concentration and formulation of the product greatly influence how well this peptide works; not all products deliver enough active peptide to be effective.
Best for
- Anyone looking to improve skin firmness and reduce fine lines
- People with mature or aging skin who want a gentle anti-aging option
Use caution if
- Those with known allergies to synthetic peptides (rare)
- Individuals seeking immediate or dramatic results (peptides work gradually)
Usage tips
Safety summary
Myristoyl Pentapeptide-14 is considered safe for cosmetic use at typical concentrations. It has a low irritation and comedogenic profile, and no significant safety concerns have been reported in available research.
Research notes
While specific studies on Myristoyl Pentapeptide-14 are limited, the broader class of signal peptides (especially palmitoyl pentapeptides) has shown moderate evidence for stimulating collagen synthesis and improving skin firmness in vitro and in small human trials. More large-scale, long-term studies are needed.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- Regulatory status
- Approved as a cosmetic ingredient in the US, EU, and other major markets. Not classified as a drug ingredient.
- Common uses
- Anti-aging serums, Eye creams, Facial moisturizers
- Environmental note
- Synthetic peptides are produced in labs, which reduces the need for animal-derived or plant-based raw materials. Their environmental impact is generally low.
Good to know
- Peptides are fragile; avoid using them with very low pH (acidic) products or strong exfoliants in the same routine.
- Store peptide products away from direct sunlight and heat to maintain stability.
Common questions
What is Myristoyl Pentapeptide-14 in beauty products?
Myristoyl Pentapeptide-14 is a lab-made protein fragment (peptide) that signals skin cells to produce more collagen and elastin, the building blocks that keep skin plump and firm. Think of it as a tiny messenger that tells your skin to act younger. It's often used in anti-aging products at very low concentrations.
What does Myristoyl Pentapeptide-14 do in a beauty product?
Once applied, the myristoyl group helps the peptide absorb into the upper layers of skin. There, it binds to receptors on fibroblasts (collagen-making cells) and stimulates them to produce more collagen and elastin. Over time, this can help improve skin firmness and reduce the appearance of fine lines and wrinkles.
Is Myristoyl Pentapeptide-14 safe for most people?
Myristoyl Pentapeptide-14 is considered safe for cosmetic use at typical concentrations. It has a low irritation and comedogenic profile, and no significant safety concerns have been reported in available research.
Who should be careful with Myristoyl Pentapeptide-14?
Those with known allergies to synthetic peptides (rare) Individuals 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.