Ingredient review
Myristoyl Tripeptide
INCI: MYRISTOYL GLYCINE/HISTIDINE/LYSINE POLYPEPTIDE
A synthetic peptide that helps support collagen and skin firmness, generally well-tolerated and suitable for most skin types.
In plain English
This ingredient is a man-made chain of amino acids (the building blocks of protein) attached to a fatty acid called myristic acid. In skincare, it's designed to signal skin cells to behave more youthfully, like boosting collagen production and strengthening the skin's outer barrier. Think of it as a tiny messenger that tells your skin to firm up and hold onto moisture better.
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 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.
- 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
Myristoyl Glycine/Histidine/Lysine Polypeptide is a synthetic peptide—a short chain of three specific amino acids (glycine, histidine, lysine) linked to a myristic acid tail. The fatty acid tail helps the peptide penetrate the skin's outer layer more easily, while the amino acid sequence is designed to mimic natural signaling fragments that support collagen synthesis and skin repair.
How it works
Once applied, the myristic acid tail helps the peptide slip into the upper layers of skin. The amino acid sequence then interacts with skin cells, encouraging them to produce more collagen and other structural proteins. This can lead to firmer, smoother skin over time. It also has mild conditioning properties, helping the skin feel softer and more hydrated.
Pros
Gentle anti-aging support
Unlike stronger actives like retinol, this peptide works subtly without causing irritation, redness, or peeling, making it suitable for sensitive skin.
Barrier-friendly
By encouraging collagen and structural protein production, it helps reinforce the skin's natural barrier, which can improve moisture retention and resilience over time.
Cons and cautions
Slow results
Peptides typically take weeks to months of consistent use to show visible improvements in firmness or lines. It's not a quick fix.
Variable effectiveness
The concentration and overall formulation matter a lot. A low concentration or poorly formulated product may not deliver noticeable benefits.
Best for
- Anyone looking to support skin firmness and reduce fine lines
- People with normal to dry skin who want a gentle anti-aging option
Use caution if
- Those with known allergies to any peptide or fatty acid component (rare)
Usage tips
Safety summary
Myristoyl Glycine/Histidine/Lysine Polypeptide is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, and no significant safety concerns have been raised by regulatory or scientific bodies.
Research notes
Peptides with similar amino acid sequences have been studied for their ability to stimulate collagen production in vitro and in small clinical studies. While direct studies on this exact peptide are limited, the broader class of myristoyl peptides is well-recognized in dermatology for anti-aging benefits. Evidence is moderate and supports its use as a gentle supportive ingredient.
Common label clues
- Typical concentration
- Typically used at 0.1% to 2% in leave-on products
- 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, Firming creams, Eye treatments
- Environmental note
- Synthetic production reduces reliance on animal-derived peptides, but the fatty acid source (myristic acid) may come from palm oil. Look for brands that source sustainably if this is a concern.
Good to know
- This peptide is often found in anti-aging serums and eye creams.
- It is water-soluble and can be formulated into clear or opaque products.
- The myristic acid tail is derived from coconut or palm oil, but the final ingredient is fully synthetic.
Common questions
What is Myristoyl Tripeptide in beauty products?
This ingredient is a man-made chain of amino acids (the building blocks of protein) attached to a fatty acid called myristic acid. In skincare, it's designed to signal skin cells to behave more youthfully, like boosting collagen production and strengthening the skin's outer barrier. Think of it as a tiny messenger that tells your skin to firm up and hold onto moisture better.
What does Myristoyl Tripeptide do in a beauty product?
Once applied, the myristic acid tail helps the peptide slip into the upper layers of skin. The amino acid sequence then interacts with skin cells, encouraging them to produce more collagen and other structural proteins. This can lead to firmer, smoother skin over time. It also has mild conditioning properties, helping the skin feel softer and more hydrated.
Is Myristoyl Tripeptide safe for most people?
Myristoyl Glycine/Histidine/Lysine Polypeptide is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, and no significant safety concerns have been raised by regulatory or scientific bodies.
Who should be careful with Myristoyl Tripeptide?
Those with known allergies to any peptide or fatty acid component (rare)
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.