Matrixyl dosage and evidence
Written by Aaron CuhaReviewed Sep 2026
The short answer
Matrixyl is a popular skin cream peptide that tells skin to make more collagen. It is studied for fine lines and firmness.
Evidence grade for Matrixyl: Moderate. The rule: at least one finished study in people, and at least 100 people who took it. The sum on this page: 2 completed trials, 114 people given it. A grade counts how much has been done to people, not whether it works.
- People given it
- 114
- Human studies
- 2
- Found nothing
- 0
Dose
No human dose established
Amounts that were given in studies sit in Human evidence on this page. None of them is a personal dose.
2 completed trials, 114 people given it
7 effects reported, 4 unwanted, 3 wanted, by people using it, not a trial
Goal pages: Skin, hair and appearance
In plain English
In plain English, from Aaron
This is how I would explain it to a friend. The evidence, with the numbers, is further down the page.
Matrixyl is a skincare peptide meant to make your skin build more collagen. Collagen is the stuff that keeps skin firm. It is a small piece of collagen itself, with a fat tail stuck on to help it soak in. It is in a lot of anti aging creams. It is allowed in cosmetics and it is not a drug.
What people take it for
- Firmer skin and fewer fine lines.
- Rebuilding collagen as it drops with age.
- A gentler option than retinol.
- Often stacked with Argireline in the same serum.
What studies in people showed
This one has the best cream trial of the three cosmetic peptides on this site. In 2005, 93 women used the peptide cream on one side of the face and a blank moisturizer on the other for 12 weeks. The peptide side had fewer wrinkles and fine lines, and the gap was big enough to count. The blank cream was the same cream without the peptide, which is the right way to test it. The other study on the page is from 1993 and was done in a dish. In that dish, the peptide made skin cells make more collagen. The dish result is where the collagen story comes from. Here is what the page does not have. It has no test of how much gets through the skin. The page says it gets into the surface, but no study on the page measured that. And 12 weeks is the longest anyone has looked.
What people report
Reports, not study results
The good
- Skin feels firmer and looks smoother after two to three months. This is the most common positive report.
- Fine lines around the eyes and mouth look softer.
- Gentle enough to use twice a day with no peeling, unlike retinol.
The bad
- Nothing happens. Plenty of people use it for months and see no change.
- Mild redness or stinging, usually from the rest of the serum.
- Breakouts on oily skin, which people blame on the fatty tail on the peptide.
- Results fade if you stop, so it is a forever product.
Where these come from: The 2005 trial on this page is the source for the wrinkle result and did not report side effects. The good and bad lists come from skincare forums such as r/SkincareAddiction and r/30PlusSkinCare, from dermatologist write ups, and from product reviews. None of it is from a trial.
My bottom line
Of the cream peptides, this is the one with a real trial behind it, and it is cheap and safe. Use it if you like. It will not replace sunscreen, and it will not do anything for your health past your face.
An opinion, not a finding. I am a coach, not a doctor.
What it has been measured to do
Measured in people
Goals Matrixyl has been tested for in people, biggest studies first. We count only what the studies on this page say, so the real numbers may be higher.
- Skin, wrinkles and elasticity93 people · 1 study
35 of the 36 indexed goals have no study of any kind behind Matrixyl
No study in people, animals or cells on this page reports a result for these. That does not prove Matrixyl does nothing for them. It does mean anything you have heard about Matrixyl and one of these did not come from a study cited here.
Show full evidence
What is Matrixyl?
Matrixyl is a popular skin cream peptide that tells skin to make more collagen. It is studied for fine lines and firmness.
Matrixyl is a peptide with a fat chain attached, used widely in anti-ageing skin care. It works as a signal that tells skin cells to make more collagen and other support material. That can soften fine lines and firm the skin. In the key study, 93 women used the cream on one side of the face and a plain moisturiser on the other for 12 weeks. Wrinkles and fine lines improved more on the treated side. In a dish, the core peptide made skin cells produce more collagen. It has several controlled skin studies behind it. It is a cosmetic ingredient, not a drug.
How does Matrixyl work?
It signals skin cells to make more collagen and support material, which helps the skin's structure.
What have studies in people found about Matrixyl?
There are two studies in people. The one that nearly every ad leans on was designed and run by Procter and Gamble, which sells this peptide, pal-KTTKS, in its own Olay skincare. It found fewer wrinkles on the treated side of the face. The other is a 21-person study from a university group, where it did better than Argireline and a dummy cream.
- Sun-aged facial skin, 2005, 93 white women aged 35 to 55: each put a moisturizer with 3 ppm pal-KTTKS on one side of the face and the same moisturizer without it on the other, for 12 weeks. Chance picked the side, and nobody knew which was which. The peptide side had clearly fewer wrinkles and fine lines, on computer image analysis and to expert graders. The women said they saw a clear difference too. It caused no problems. All six authors work at Procter and Gamble.
- Crow's feet, Indonesia, 2023, 21 women aged 26 to 55: about seven each got this peptide cream, an Argireline cream, or a dummy cream, twice a day for eight weeks, and nobody knew who got which. Skin was checked with instruments, photos, the women's own views and a wrinkle scale. The authors say this peptide beat both the other cream and the dummy. They call it early work that needs more people, and report no conflicts.
What this does not tell you: Two studies, 114 people in all, and the longer one ran 12 weeks. The 2005 study treated one side of each face and not the other, which is a fair test within each person. But its authors work for the company that sells the product. The 2023 study had about seven people per group, which is too few to measure an effect, and the authors say so. Neither followed anyone past three months, neither measured collagen in a skin sample, and neither tested the strength used in most shop products, which is rarely listed. The idea that it tells skin cells to make more collagen came from cells in a dish. No study on this page has measured that in a person.
The state of the research
Matrixyl is a brand name, not a molecule, and that matters when reading the research. The peptide underneath is pal-KTTKS. It is a small piece of collagen with a fatty tail added to help it get into skin, first described in a 1993 lab paper on cells. The Matrixyl name belongs to a supplier, and the versions sold under it, such as Matrixyl 3000 and Matrixyl synthe'6, are different peptide blends. So a study of pal-KTTKS is not automatically a study of what is in a given bottle.
As with every cosmetic ingredient in the US, nobody has to prove it works before selling it. So the only studies that get paid for are the ones a seller wants. Here that produced an unusually good study by cosmetic standards, with an unusually clear conflict. The 12-week study in 93 women was well built: chance picked which side of the face got the peptide, and nobody knew which. It was also designed, run, analysed and published by Procter and Gamble's own labs, and the company sells pal-KTTKS in Olay. Saying so is not an accusation. Split-face studies are hard to rig, and the result is what it is. It does mean the best evidence in people for this ingredient has not been repeated by anyone without a business interest in twenty years. That gap is about who pays, not a scientific verdict.
What sets Matrixyl apart from the peptides sold as Botox in a jar is that it does not need to reach a nerve. It only has to reach skin cells in the deeper layer and act as a signal there. That is an easier target for a peptide with a fatty tail. A lab study of how fast skin enzymes break down cosmetic peptides also uses pal-KTTKS as its yardstick. That makes the idea more believable. It is not proof it works at the strength in shop products. Nobody has published how much it takes to work in people, and no outside group has repeated the one good study.
The evidence, in charts
Fig. 1a · how many people
114people, across 2 studies in people cited here
| Study | People | Share |
|---|---|---|
| International Journal of Cosmetic Science 2005 | 93 | 82% |
| Journal of Clinical and Aesthetic Dermatology 2023 | 21 | 18% |
One study holds 82% of these people, so the total rests more on one study than its size suggests. Counts are the number of people each study on this page says it signed up. That includes studies that only watched people and gave nobody the compound. Studies still signing people up are left out, and only studies cited on this page are counted.
Fig. 1b · evidence mix
2 of 4 sources here are studies in people. The rest are not.
- Study in people · done in people250%
- Lab (cells in a dish) · cells or tissue250%
Counted from the list of sources on this page. It counts only what we cite, so there may be more studies out there. A review counts once, however many studies it sums up.
Fig. 2 · evidence over time
The studies cover 4 different years, 1993 to 2023, counted from the list of sources on this page.
Fig. 3 · legal status at a glance
US
Not approved
UK
Not approved
AU
Not approved
CA
Not approved
Not approved in any of the four countries shown. This is what the law says, not a verdict on the science. See Legal status below for the full text and any notes.
Fig. 4 · how much does what
Nobody has tested different amounts in people
This chart would show how the effect changes as the amount goes up. For this compound, nobody has measured that in people. So we leave it empty. We will not borrow an animal chart and pretend it works the same in people.
Fig. 5 · what the molecule is
- Kind of compound
- Peptide
- Molecule weight
- 802.0 Da
- Half-life
- Stated in words, not a numbersee the exact wording below
- Chain length
- None on file
No amino acid sequence is on file for Matrixyl, so none is drawn rather than guessed from a name.
The studies we cite
- Study in people2005Topical palmitoyl pentapeptide provides improvement in photoaged human facial skin
This is the best designed trial any of these cosmetic peptides has, and the peptide won. Ninety three women put the active cream on one side of the face and a plain moisturiser on the other for twelve weeks. Each woman was her own comparison, which removes most of the ways skin studies mislead. Wrinkles and fine lines improved more on the treated side. The comparison was a plain moisturiser, not nothing at all, and the change is a cosmetic one measured over three months.
93 women, 12-week split-face trial: pal-KTTKS significantly reduced wrinkles and fine lines versus placebo moisturizer.
- Study in people2023Double-blind, Randomized Trial on the Effectiveness of Acetylhexapeptide-3 Cream and Palmitoyl Pentapeptide-4 Cream for Crow's Feet.
The only head to head of these two cosmetic peptides that no seller paid for, and this one won it. 21 Indonesian women were sorted by chance into three creams for eight weeks: palmitoyl pentapeptide-4, acetylhexapeptide-3, or a dummy. That is roughly seven women per group. Palmitoyl pentapeptide-4 came out ahead of both. The authors call it initial work needing a proper sample size, and they are right. Seven people per group cannot measure an effect. No conflicts were reported.
21 Indonesian women in three arms of roughly seven, palmitoyl pentapeptide-4 cream against acetylhexapeptide-3 cream against placebo for eight weeks. The authors report palmitoyl pentapeptide-4 doing better than both comparators and call the work initial, requiring an adequate sample size. No conflicts of interest reported, which makes it the only human comparison of these two peptides not run by a seller of either.
- Lab (cells in a dish)1993A pentapeptide from type I procollagen promotes extracellular matrix production
In a dish. The core KTTKS peptide made skin cells produce more collagen and fibronectin. Matrixyl is built on it.
The KTTKS pentapeptide stimulated collagen and fibronectin production in fibroblasts, the basis for palmitoyl pentapeptide.
- Lab (cells in a dish)2021Susceptibility of cosmeceutical peptides to proteases activity: Development of dermal stability test by LC-MS/MS analysis.
In a lab test, not in a person. This paper builds a way to measure how fast skin enzymes break down cosmetic peptides. Pal-KTTKS, the molecule sold as Matrixyl, is the yardstick the test is set against. The method was checked in rat skin and then run on ground-up human skin samples, not living skin. It shows that a peptide's survival in skin can be measured. It does not show the peptide does anything. One author worked part-time for a peptide company, which was disclosed.
A method paper that uses pal-KTTKS as the reference peptide for measuring how fast a cosmetic peptide is destroyed by proteases in skin homogenate, validated on rat skin and then applied to human skin samples. Establishes that the question of dermal survival is measurable and that pal-KTTKS is the benchmark for it. Skin homogenate, not a person. One author was employed part-time by a peptide company, disclosed.
Where to buy Matrixyl
12 sellers list Matrixyl in our latest read. They are ranked by trust score, then by archive rating, then by certificate tier, then by the lowest price per milligram. Archive evidence is counted before source-backed. Each path is out of 4, and the two are not added. A higher price does not raise the score. The letter is the certificate chip. 1 of them has a published certificate that names Matrixyl.
Some seller links may pay this site when you buy through them. A payment never changes a seller's tier or rank, and no seller has a say in any page.
| Seller | Trust score | Vial sizes | From, per mg | Certificate for Matrixyl | Seller link |
|---|---|---|---|---|---|
| Modern Research Peptides | 67 FairSource-backed 4 of 4. Archive evidence 4 of 4.LC | 10 mg | $6.00 | Lab-confirmed certificate, Freedom Diagnostics | View |
| Ion Peptide | 60 FairSource-backed 2 of 4. Archive evidence 0 of 4.C | 10 mg | $12.9 | None found for Matrixyl | View |
| Limitless Bio-Tech | 52 FairSource-backed 1 of 4. Archive evidence 1 of 4.C | 10 mg | $4.28 | None found for Matrixyl | View |
| Core Peptides Official | 49 WeakSource-backed 3 of 4. Archive evidence 2 of 4.A | 200 mg | $0.775 | None found for Matrixyl | View |
| Peptify Labs | 49 WeakSource-backed 3 of 4. Archive evidence 2 of 4.A | 10 mg | $6.60 | None found for Matrixyl | View |
| Peptide Shop A | 49 WeakSource-backed 2 of 4. Archive evidence 2 of 4.B | 200 mg | $0.950 | None found for Matrixyl | View |
| Behemoth Labz | 49 WeakSource-backed 3 of 4. Archive evidence 1 of 4.B | 10 mg | $1.91 | None found for Matrixyl | View |
| Limitless Biotech ST | 36 WeakSource-backed 1 of 4. Archive evidence 1 of 4.C | 200 mg | $0.855 | None found for Matrixyl | View |
| Lejian Biotech Peptide | 35 WeakSource-backed 1 of 4. Archive evidence 1 of 4.C | 200 mg | $0.850 | None found for Matrixyl | View |
| Huaian Hanyou Peptide | 25 InsufficientSource-backed 1 of 4. Archive evidence 1 of 4.C | 200 mg | $0.850 | None found for Matrixyl | View |
| MJA Peptides | 25 InsufficientSource-backed 1 of 4. Archive evidence 1 of 4.C | 200 mg | $0.850 | None found for Matrixyl | View |
| ZL Peptides | 25 InsufficientSource-backed 1 of 4. Archive evidence 1 of 4.C | 200 mg | $0.850 | None found for Matrixyl | View |
- LC Lab-confirmed: the issuing laboratory echoed this certificate back
- A Current certificate, independent laboratory named, laboratory not yet checked
- B Certificate published, but no laboratory link, older than a year, or the laboratory did not recognise the published lookup
- C No certificate could be read
Every listing and vial size for Matrixyl · How the trust score is counted
Sellers named on the price pages are ranked by certificate tier, then price, and any affiliate income is disclosed there. Naming a seller is not a recommendation to buy or use anything.
Common questions
Has Matrixyl been tested in people?
Yes. 114 people given it across 2 completed trials cited here, 0 of which found nothing. Matrixyl is a popular skin cream peptide that tells skin to make more collagen. It is studied for fine lines and firmness.
What is the Matrixyl dosage?
No human dose established. Amounts that were given in studies sit in Human evidence on this page. None of them is a personal dose. 2 completed trials, 114 people given it
Is Matrixyl FDA-approved?
Cosmetic ingredient; not an approved drug
How is Matrixyl different from Argireline?
Matrixyl tells skin to make more collagen, to improve its structure. Argireline aims to relax expression lines. Skin care products often combine them.
Latest reading on Matrixyl
Blog posts about Matrixyl, newest first.