Ingredient review
Myristoyl Tetrapeptide-6
INCI: Myristoyl Tetrapeptide-6
A gentle peptide that may help reduce visible redness and support a calmer, more even complexion over time.
In plain English
Myristoyl tetrapeptide-6 is a lab-made peptide (a small chain of amino acids) that is often added to skincare products to help soothe the skin. It works by signaling skin cells to reduce the production of inflammatory molecules, which can help calm redness and irritation. Because it is used in very tiny amounts, it is generally very gentle and unlikely to cause problems for most skin types.
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 Tetrapeptide-6 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 Tetrapeptide-6.
- 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 tetrapeptide-6 is a synthetic peptide composed of four amino acids (tetrapeptide) attached to a myristic acid chain. This fatty acid tail helps the peptide penetrate the skin's outer layer more effectively. It is often included in formulations aimed at reducing visible signs of irritation and promoting a more even skin tone.
How it works
When applied topically, myristoyl tetrapeptide-6 is thought to interact with skin cells to downregulate the production of pro-inflammatory signaling molecules (such as interleukins and tumor necrosis factor). By calming this inflammatory cascade, the peptide can help reduce visible redness, puffiness, and sensitivity. Over time, this may support a more balanced and resilient skin barrier.
Pros
Gentle soothing action
Myristoyl tetrapeptide-6 is designed to calm visible irritation without causing stinging or dryness, making it suitable for sensitive skin.
Low irritation potential
Because it is used at very low concentrations and is synthetic, it rarely triggers allergic reactions or breakouts, even for acne-prone skin.
Cons and cautions
Modest evidence base
While promising, the research on myristoyl tetrapeptide-6 is still limited compared to more established soothing ingredients like niacinamide.
Results may be subtle
The calming effects are often mild and may take weeks of consistent use to become noticeable, which might not satisfy those seeking immediate relief.
Best for
- People with sensitive or reactive skin looking for a gentle soothing ingredient
- Those wanting to address mild redness or uneven skin tone
Use caution if
- Individuals with a known allergy to any peptide or fatty acid component (rare)
Usage tips
Safety summary
Myristoyl tetrapeptide-6 is considered safe for cosmetic use at typical concentrations. It has a low irritation and comedogenic risk, and no significant safety concerns have been reported in available research or regulatory reviews.
Research notes
Clinical and laboratory studies suggest myristoyl tetrapeptide-6 can reduce markers of inflammation and visible redness. However, most evidence comes from in vitro or small-scale human trials, and more large-scale, independent studies are needed to confirm its efficacy and long-term safety.
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 or medicine.
- Common uses
- Serums, Moisturizers, Eye creams, Anti-aging treatments
- Environmental note
- As a synthetic peptide, it is produced in controlled laboratory settings, which reduces environmental impact compared to some plant-derived extracts. However, its biodegradability is not well documented.
Good to know
- Myristoyl tetrapeptide-6 is often combined with other peptides or soothing ingredients like niacinamide for enhanced benefits.
- It is stable in most formulations and does not require special packaging or storage.
Common questions
What is Myristoyl Tetrapeptide-6 in beauty products?
Myristoyl tetrapeptide-6 is a lab-made peptide (a small chain of amino acids) that is often added to skincare products to help soothe the skin. It works by signaling skin cells to reduce the production of inflammatory molecules, which can help calm redness and irritation. Because it is used in very tiny amounts, it is generally very gentle and unlikely to cause problems for most skin types.
What does Myristoyl Tetrapeptide-6 do in a beauty product?
When applied topically, myristoyl tetrapeptide-6 is thought to interact with skin cells to downregulate the production of pro-inflammatory signaling molecules (such as interleukins and tumor necrosis factor). By calming this inflammatory cascade, the peptide can help reduce visible redness, puffiness, and sensitivity. Over time, this may support a more balanced and resilient skin barrier.
Is Myristoyl Tetrapeptide-6 safe for most people?
Myristoyl tetrapeptide-6 is considered safe for cosmetic use at typical concentrations. It has a low irritation and comedogenic risk, and no significant safety concerns have been reported in available research or regulatory reviews.
Who should be careful with Myristoyl Tetrapeptide-6?
Individuals with a known allergy 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.