Ingredient review
Myristoyl Tripeptide-31
INCI: MYRISTOYL TRIPEPTIDE-31
A synthetic peptide that signals skin to appear firmer and smoother, with low irritation potential.
In plain English
Myristoyl tripeptide-31 is a lab-made chain of three amino acids (a tripeptide) attached to a fatty acid (myristic acid) to help it absorb into skin. It works like a tiny messenger, telling skin cells to produce more collagen and other supportive proteins. This can help improve skin firmness and soften the look of fine lines over time. Because it's synthetic, it's consistent and generally well-tolerated, even by sensitive skin.
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 Tripeptide-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 Tripeptide-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 three amino acids (tripeptide) bound to myristic acid, designed to mimic natural signaling molecules that encourage collagen production in the skin.
How it works
When applied topically, the myristoyl group helps the peptide penetrate the outer layer of skin. Once inside, the tripeptide fragment binds to specific receptors on fibroblasts, triggering them to increase collagen and elastin synthesis. This helps reinforce the skin's structural support, leading to improved firmness and a reduction in fine lines over weeks of consistent use.
Pros
Gentle anti-aging support
Myristoyl tripeptide-31 is well-tolerated even by sensitive skin types, making it a good entry-level anti-aging ingredient without the irritation of stronger actives like retinol.
Targets collagen production
It directly signals skin cells to produce more collagen, addressing the root cause of sagging and fine lines rather than just hydrating the surface.
Cons and cautions
Slow, subtle results
You won't see changes overnight. It typically takes 4–8 weeks of daily use to notice visible improvements in firmness and wrinkle depth.
Effectiveness depends on formulation
The peptide must be properly stabilized and delivered at an effective concentration. A poorly formulated product may not deliver noticeable benefits.
Best for
- Anyone looking to improve skin firmness and reduce fine lines
- People with sensitive skin who want a gentle anti-aging option
Use caution if
- Those seeking immediate or dramatic results
- Individuals allergic to any component of the peptide complex
Usage tips
Safety summary
Myristoyl tripeptide-31 is considered safe for cosmetic use at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin. No significant safety concerns have been reported in available literature.
Research notes
Clinical studies on similar palmitoyl peptides show they can stimulate collagen synthesis and improve skin firmness. While specific studies on myristoyl tripeptide-31 are limited, the mechanism is well-understood and supported by broader peptide research. Evidence is moderate but positive.
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.
- Common uses
- Anti-aging serums, Firming creams, Eye treatments
- Environmental note
- Synthetic peptides are produced in controlled lab conditions, which reduces environmental impact compared to animal-derived ingredients. However, they are not biodegradable and may accumulate in water systems.
Good to know
- Peptides are fragile; avoid using them with very low pH products (like strong AHAs) at the same time.
- Myristoyl tripeptide-31 is often combined with other peptides or antioxidants for synergistic effects.
Common questions
What is Myristoyl Tripeptide-31 in beauty products?
Myristoyl tripeptide-31 is a lab-made chain of three amino acids (a tripeptide) attached to a fatty acid (myristic acid) to help it absorb into skin. It works like a tiny messenger, telling skin cells to produce more collagen and other supportive proteins. This can help improve skin firmness and soften the look of fine lines over time. Because it's synthetic, it's consistent and generally well-tolerated, even by sensitive skin.
What does Myristoyl Tripeptide-31 do in a beauty product?
When applied topically, the myristoyl group helps the peptide penetrate the outer layer of skin. Once inside, the tripeptide fragment binds to specific receptors on fibroblasts, triggering them to increase collagen and elastin synthesis. This helps reinforce the skin's structural support, leading to improved firmness and a reduction in fine lines over weeks of consistent use.
Is Myristoyl Tripeptide-31 safe for most people?
Myristoyl tripeptide-31 is considered safe for cosmetic use at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin. No significant safety concerns have been reported in available literature.
Who should be careful with Myristoyl Tripeptide-31?
Those seeking immediate or dramatic results Individuals allergic to any component of the peptide complex
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.