# Matrixyl (palmitoyl pentapeptide-4)

The classic 'collagen-signal' cosmetic peptide; slow, soft smoothing, more hydration than lift.

- Page: https://peprank.xyz/peptides/matrixyl
- Category: Skin & hair (Supplement)
- Also known as: Pal-KTTKS; palmitoyl pentapeptide-4 (formerly palmitoyl pentapeptide-3); Matrixyl 3000 (palmitoyl tripeptide-1 + palmitoyl tetrapeptide-7); Matrixyl synthe'6 (palmitoyl tripeptide-38); The Ordinary Matrixyl 10% + HA / 'Buffet' multi-peptide serum
- Routes: Topical
- Sequence: KTTKS (palmitoyl- (palmitoyl pentapeptide-4))
- Safety tier: Strict: Clean · Balanced: Clean · Evidence only: Clean
- Risk axes (0 none to 3 severe): Seen harm 0, Mechanism 0, Data gap 0, Silent harm 0, Product 0
- Positive: 45% of 21 graded reports glowing or positive, shrunk toward the 49% all-report average by 8 reports' weight
- Rank: #15 of 23 supplements
- Graded reports: 21 (Positive 9, Mixed 2, Nothing 5, Negative 5)
- Evidence: Human RCTs — one independent-looking but industry-run (P&G) 12-week split-face RCT for pal-KTTKS (n=93) plus manufacturer data for Matrixyl 3000/synthe'6; mechanism from fibroblast work; penetration of a lipidated pentapeptide through intact skin is limited
- Access: Supplement
- Onset: 8-12 weeks for any visible change; hydration feel immediately
- Lasts: Effects fade over weeks after stopping
- Cost per month: ≈ €4–13 (researchers' estimate)
- Updated: 2026-10-30

## What users report

Long-term users describe a quiet benefit: smoother texture, plumper and better-hydrated skin, forehead lines that soften over months, and several 'I only noticed when I stopped' reports (often with The Ordinary's Buffet, which bundles Matrixyl 3000 and other peptides). Nobody reports dramatic change, and most credit a stack with tretinoin, vitamin C or copper peptides, so the peptide's own share is unclear. About a quarter see nothing after several bottles. A distinct minority, about a quarter of reports, find The Ordinary's glycerin-heavy serum drying or sticky, with lines and pores looking worse within days and back to normal a week after stopping. Some say Matrixyl synthe'6 worked where Matrixyl 3000 did not. Felt nothing: ~25% of reports (5/21); another ~25% said lines looked worse while using it.

**Effects:** smoother texture, 'plumper' skin; hydration (the HA/glycerin base does much of this); gradual softening of fine forehead and eye lines over months; 'noticed only when I stopped' slowing of change

**Downsides:** drying, tight or flaky skin in some, making lines look worse until stopped; sticky texture / pilling under other products (The Ordinary version); slow; nothing visible before 8-12 weeks; weakened by strong acids applied at the same time

**Caveat:** Cosmetic-review bodies (CIR 2024) call palmitoyl pentapeptide-4 safe as used, and decades of mass-market use show no harm signal. The question is efficacy: the best trial is industry-run and small, and 'Matrixyl 10%' on a label is 10% of a dilute raw-material solution (ppm of actual peptide), not 10% peptide. The drying reports seem to come from the glycerin-heavy vehicle on dry skin, not the peptide itself.

**Typical use:** Apply 2-3 drops of a Matrixyl serum to face once or twice daily, after water-based serums and before moisturiser; avoid applying with direct acids or strong vitamin C at the same time.

**Getting it:** Over-the-counter cosmetic: The Ordinary Matrixyl 10% + HA and 'Buffet', Timeless Matrixyl 3000 / synthe'6, Minimalist, Geek & Gorgeous and many peptide serums. No grey-market vials needed.

**Stacked with:** Argireline (The most common pairing on Reddit (The Ordinary sells both); argireline for expression lines, Matrixyl all over the face.); tretinoin or retinal (Usual base of an anti-aging routine; most of the visible change is usually credited to the retinoid.); GHK-Cu (topical) (Often layered or bought pre-mixed (Buffet + Copper Peptides).)

## Risk profile

- **Seen harm 0/3:** Mass-market use since the early 2000s without a serious signal; patch tests in 157 people showed no sensitisation, and first-hand complaints are dryness and lines looking worse.
- **Mechanism 0/3:** A lipidated collagen fragment that signals fibroblasts in vitro and barely penetrates skin; no pathway to serious harm is known.
- **Data gap 0/3:** The CIR Expert Panel concluded in 2024 that it is safe as used, backed by decades of mass cosmetic use and a 93-person RCT.
- **Silent harm 0/3:** Dryness or irritation shows within days and clears on stopping.
- **Product 0/3:** OTC cosmetic serums from mainstream brands.

## Top reports

- Positive, skin-hair, The Ordinary Buffet (multi-peptide incl. Matrixyl 3000): “i use TO’s buffet (peptides + ha now i think). It’s one of those products that I didn’t think i saw a change and then i stopped it. THEN i noticed what it was doing for me. it’s been wonderful for me.” — [r/30PlusSkinCare](https://www.reddit.com/r/30PlusSkinCare/comments/yzq862/did_peptides_matrixyl_actually_made_a_difference/ix3op6p/)
- Positive, skin-hair, The Ordinary Matrixyl 10% + HA with Argireline: “I love both. Religious user. I'm 34 and they have made a noticeable difference in my skin texture.” — [r/30PlusSkinCare](https://www.reddit.com/r/30PlusSkinCare/comments/1b51itt/opinions_on_the_ordinary_matrixyl_or_argireline/kt2vybs/)
- Positive, skin-hair, Timeless Matrixyl synthe'6: “I prefer the texture and the results from the Synth’6. Not greasy after absorption, works well under makeup—on my second bottle and will continue with it. I have noticed improvement of fine lines, but like with everything, I’m sure it’s due to my combination of products” — [r/30PlusSkinCare](https://www.reddit.com/r/30PlusSkinCare/comments/ukgeev/timeless_matrixyl_synth6_experiences/nhedq5b/)
- Positive, skin-hair, The Ordinary Matrixyl 10% + HA: “I have used The Ordinary matrixyl+HA for years and feel like I get good results in relation to improved texture” — [r/30PlusSkinCare](https://www.reddit.com/r/30PlusSkinCare/comments/1x37e4i/which_of_these_three_peptides_has_worked_for_you/pfbc289/)
- Positive, skin-hair, Timeless CoQ10 Matrixyl 3000 serum: “I'm about 3 years into using the Timeless Beauty CoQ10 Matrixyl 3000 serum... at 34 I look about the same as I did in my mid to late 20's. My forehead lines are pretty much gone, my smile lines are still there, but they haven't gotten any deeper” — [r/30PlusSkinCare](https://www.reddit.com/r/30PlusSkinCare/comments/1kz7g59/has_anyone_actually_seen_longterm_results_with/n6pex0o/)

## Cheapest in Europe

- [CertaPeptides](https://certapeptides.com/shop/matrixyl-10mg) (RO): Matrixyl (Palmitoyl Pentapeptide-4) 10mg, €20, €2.00/mg

## Studies

- [Robinson et al., Topical palmitoyl pentapeptide provides improvement in photoaged human facial skin (Int J Cosmet Sci 2005)](https://pubmed.ncbi.nlm.nih.gov/18492182/) (rct, n=93, 2005): Women 35-55, 12 weeks, split-face vs the same moisturiser: 3 ppm pal-KTTKS gave significant wrinkle/fine-line reduction by image analysis and expert grading; well tolerated. Procter & Gamble study.
- [Katayama et al., A pentapeptide from type I procollagen promotes extracellular matrix production (J Biol Chem 1993)](https://pubmed.ncbi.nlm.nih.gov/8486721/) (in-vitro, 1993): KTTKS, a fragment of the type I procollagen propeptide, stimulated collagen and fibronectin synthesis in fibroblasts: the basis of the 'matrikine' claim.
- [Gorouhi & Maibach, Role of topical peptides in preventing or treating aged skin (Int J Cosmet Sci 2009)](https://pubmed.ncbi.nlm.nih.gov/19570099/) (review, 2009): Signal peptides such as pal-KTTKS show modest benefit in small, mostly industry-sponsored trials; independent confirmation is thin.

## Sources

- [CIR Expert Panel: Safety Assessment of Myristoyl Pentapeptide-4, Palmitoyl Pentapeptide-4 and Pentapeptide-4 as Used in Cosmetics (final report, 2024)](https://www.cir-safety.org/sites/default/files/FR_Pentapeptides_092024.pdf)
- [r/30PlusSkinCare: Has anyone actually seen long-term results with Matrixyl serums?](https://www.reddit.com/r/30PlusSkinCare/comments/1kz7g59/has_anyone_actually_seen_longterm_results_with/)
- [r/30PlusSkinCare: Matrixyl worsening of wrinkles?](https://www.reddit.com/r/30PlusSkinCare/comments/11i8uph/matrixyl_worsening_of_wrinkles/)