Ingredient review
Myristoyl Octapeptide-31
INCI: MYRISTOYL OCTAPEPTIDE-31
A synthetic peptide that may help firm skin and soften expression lines, but research is still emerging.
In plain English
Myristoyl Octapeptide-31 is a lab-made chain of amino acids (a peptide) that is attached to a fatty acid (myristic acid) to help it absorb into skin. It is often used in anti-aging products to target fine lines and loss of firmness. Think of it as a signal that tells skin cells to act younger, but results are subtle and not guaranteed.
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 Octapeptide-31 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 Octapeptide-31.
- 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 eight amino acids linked to myristic acid, designed to mimic natural signaling molecules in the skin.
How it works
The myristic acid tail helps the peptide penetrate the outer skin layer. Once inside, the peptide may signal skin cells to produce more collagen and other structural proteins, potentially improving firmness and reducing the appearance of fine lines over time.
Pros
Low irritation risk
Most skin types tolerate it well, making it suitable for sensitive skin.
Targets multiple signs of aging
May help with both fine lines and loss of firmness, offering broad anti-aging support.
Cons and cautions
Subtle results
Improvements are gradual and may not be noticeable for several weeks of daily use.
Limited research
Most evidence comes from the manufacturer; independent studies are scarce.
Best for
- Adults looking for gentle anti-aging support
- Those with dry or normal skin wanting extra firmness
Use caution if
- Individuals with known allergies to peptides or fatty acids
- Those seeking immediate or dramatic results
Usage tips
Safety summary
Considered safe for cosmetic use at typical concentrations. Rare reports of mild irritation in very sensitive individuals. No known serious safety concerns.
Research notes
Manufacturer studies suggest anti-aging benefits, but independent peer-reviewed research is limited. More studies are needed to confirm efficacy and mechanism.
Common label clues
- Typical concentration
- 0.001% to 0.1%
- 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, Firming lotions
- Environmental note
- Synthetic production reduces reliance on animal-derived ingredients, but the environmental impact of peptide synthesis is not well documented.
Good to know
- Often found in combination with other peptides for synergistic effects.
- The myristic acid tail is derived from coconut or palm oil, but the final ingredient is fully synthetic.
Common questions
What is Myristoyl Octapeptide-31 in beauty products?
Myristoyl Octapeptide-31 is a lab-made chain of amino acids (a peptide) that is attached to a fatty acid (myristic acid) to help it absorb into skin. It is often used in anti-aging products to target fine lines and loss of firmness. Think of it as a signal that tells skin cells to act younger, but results are subtle and not guaranteed.
What does Myristoyl Octapeptide-31 do in a beauty product?
The myristic acid tail helps the peptide penetrate the outer skin layer. Once inside, the peptide may signal skin cells to produce more collagen and other structural proteins, potentially improving firmness and reducing the appearance of fine lines over time.
Is Myristoyl Octapeptide-31 safe for most people?
Considered safe for cosmetic use at typical concentrations. Rare reports of mild irritation in very sensitive individuals. No known serious safety concerns.
Who should be careful with Myristoyl Octapeptide-31?
Individuals with known allergies to peptides or fatty acids Those seeking immediate or dramatic results
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.