MATRIXYL 3000 & ARGIRELINE: WHAT THE PUBLISHED DATA MEASURED
Five published studies. Three cosmetic peptides: Argireline, plus Tripeptide-1 and Tetrapeptide-7, the pair sold together as Matrixyl 3000. What each one measured, at what dose, and why all three sit in one cream.
Expression lines are the first place most men notice age, and they are not really about skin sitting still. They are about the same fold happening in the same place, thousands of times, on skin that has been thinning and losing firmness since your twenties. Sun exposure speeds that along. The result is the crease that used to disappear when you stopped squinting and now does not quite go away.
So there are two separate things in play, and they are not the same problem. There is how deep the fold looks. And there is how firm and even the skin around it looks. One ingredient rarely does both well, which is why Vector ONE carries three peptides instead of one.
Each was picked for a different published endpoint, and each percentage is printed on the label so you can check it against the studies below.
Argireline (Acetyl Hexapeptide-8) is the most-studied cosmetic peptide for the look of expression lines, and it takes the largest share of our 10% complex. The trials that produced the headline numbers on this page ran it at 10% as supplied. It is loaded heaviest here because it is a large, strongly water-loving molecule that a formula has to work hard to carry into skin, not because more is automatically better.
Tetrapeptide-7 (Palmitoyl Tetrapeptide-7) is in the complex for comfort. Vector ONE carries a 35.3% working-ingredient load, and a formula that heavy has to be built to sit easily on skin rather than fight it. Tetrapeptide-7 is a standard cosmetic choice in that role, and it is also one half of the pair studied in the 56-day split-face data below.
Tripeptide-1 (Palmitoyl Tripeptide-1) is the firmness side. Paired with Tetrapeptide-7 it is the combination sold as Matrixyl 3000, which is where the 45% figure for the look of deep wrinkles comes from. Both carry an attached palmitic acid tail, a formulator's modification that turns a water-loving peptide into an oil-loving one so it moves into skin's own lipid layers instead of sitting on top of them.
One peptide for the look of expression lines. Two more, studied as a pair, for firmness and for comfort. Each is quoted as supplied rather than as pure peptide, and each percentage is printed next to its name. Nothing here is one ingredient stretched across three jobs.
This is the longest and most rigorous study in the set. Sixty subjects with heavily sun-aged skin used a multi-ingredient cosmetic serum (No7 Protect & Perfect Intense Beauty Serum) once daily for six months under double-blind conditions, then continued through a six-month open-label extension. The serum paired palmitoyl oligopeptide and palmitoyl tetrapeptide-7 with other actives: retinyl palmitate, vitamin C derivatives, and botanical extracts.
At six months, 43% of the active group showed a significant improvement in the look of deep facial wrinkles against their own baseline (p = 0.013). However, the between-group comparison against vehicle at six months was not statistically significant (p = 0.10). During the open-label extension that followed, 70% of subjects showed that improvement at twelve months (p = 0.026).
| Look of wrinkles at 6 months (vs. baseline) | p = 0.013 |
| Between-group comparison at 6 months | p = 0.10 (NS) |
| Look of wrinkles at 12 months (open-label) | p = 0.026 |
| Fibrillin-1 in skin samples | p = 0.019 |
Watson et al. did not rely on visual grading alone. Skin samples taken during the study showed a statistically significant increase in fibrillin-1, one of the structural proteins that keeps skin springy, in the treated skin compared with vehicle. Note: because this was a multi-ingredient formulation, none of these results can be attributed to the peptides alone. What the retinyl palmitate and the other actives contributed is unknown.
Published in 2024, this is the best-measured modern data on this peptide pair. Thirty-seven subjects used a multi-component eye cream containing 0.25% yeast/rice fermentation filtrate, 0.1% N-acetylneuraminic acid, 0.0002% Palmitoyl Tripeptide-1 and 0.0001% Palmitoyl Tetrapeptide-7, twice daily for 12 weeks. The study used a half-face design (treated side against untreated side) and high-frequency ultrasound to measure collagen density below the surface rather than grading by eye.
The results for the full formulation: a 54.99% increase in collagen density. 28.12% more hydration. 18.81% more elasticity. 13.51% less crow's feet depth. Every measure reached p < 0.001.
| Collagen density increase (full formulation) | p < 0.001 |
| Skin hydration increase | p < 0.001 |
| Skin elasticity increase | p < 0.001 |
| Crow's feet depth decrease | p = 0.003 |
Read the doses before you read the result. The two peptides in that eye cream were present at 0.0002% and 0.0001%, thousands of times lower than the 3% and 2% as supplied in Vector ONE, and they sat alongside yeast/rice fermentation filtrate and N-acetylneuraminic acid. The 55% belongs to that complete formula. It cannot be attributed to the peptide components on their own, and it is not a number we claim for ours.
That figure came from a whole formula working together, not from two peptides acting alone: the fermentation filtrate and the N-acetylneuraminic acid hold water in the skin while the peptides do their part. We cite it because it is the best-measured modern data on this pair, and we print the doses next to it so you can weigh it yourself.
Twenty-eight volunteers. Split-face design. 3% Matrixyl 3000, which is Tripeptide-1 and Tetrapeptide-7 together as supplied, applied twice daily for 56 days. The total surface area occupied by deep wrinkles fell by 45%. Wrinkle volume fell 23.3%. Wrinkle depth fell 19.9%. Overall roughness improved 16%. Note: this data comes from Sederma, the manufacturer, in technical documents cited by the Schagen 2017 review. It is not an independent peer-reviewed trial and we are not going to present it as one.
| Deep wrinkle surface area | p < 0.05 |
| Wrinkle volume decrease | p < 0.05 |
| Wrinkle depth reduction | p < 0.05 |
| Skin roughness decrease | p < 0.05 |
That 3% is the number worth holding onto, because it is the one figure on this page measured on the same peptide pair we use, quoted the same way we quote ours: as supplied, not as pure peptide. Vector ONE carries Tripeptide-1 at 3% and Tetrapeptide-7 at 2% on that same basis. Whether the extra 2% does anything the study did not measure is not something this data answers, and we would rather say so than imply it.
The most common mistake in evaluating peptide skincare is assuming higher concentration means better results. The variable that decides whether a peptide does anything is not the percentage on the label. It is how much of it actually gets into the skin.
Acetyl Hexapeptide-8 weighs 889 Daltons and is strongly water-loving. Published permeation work is blunt about what that combination means: in a plain watery base, most of what you apply goes nowhere useful. A fraction of a percent settles into the stratum corneum, skin's outer layer, and roughly 0.01% gets past it.
Yet the Blanes-Mira study measured 30% less wrinkle depth at 10%, and the Wang review reported 48.9% anti-wrinkle efficacy. The difference is the formula around the peptide. Both used optimised oil-in-water emulsion systems built to loosen the skin's own lipid layer briefly and carry the peptide in with it.
The formula around a peptide is most of the job. A badly delivered high percentage can do less than a well delivered low one, because what actually gets into skin matters more than the figure on its own. Which is exactly why we print both: the dose, and what it is dissolved in.
The two collagen-side peptides show the same thing from the other direction. Palmitoyl Tripeptide-1 and Palmitoyl Tetrapeptide-7 carry an attached palmitic acid tail, which turns a water-loving peptide into one that dissolves into skin's own oily layers and moves in more readily than an unmodified peptide would. It is not a free pass. The rough 500-Dalton rule of thumb for what gets through skin is one both of them exceed: Tripeptide-1 is about 578 Da, Tetrapeptide-7 about 716 Da. And the Yang study measured its 55% collagen density figure from a whole multi-component eye cream that included these two at 0.0002% and 0.0001% alongside other actives. Delivery is not optional for peptides, at any dose.
"The 30% to 48.9% wrinkle reductions reported in published trials are highly contingent upon optimized, advanced delivery systems."
Permeation data. Acetyl Hexapeptide-8 review, PMCSATURATE Vector ONE carries a 10% peptide complex, quoted as supplied rather than as pure peptide: Acetyl Hexapeptide-8 at about 5%, Palmitoyl Tripeptide-1 at about 3%, Palmitoyl Tetrapeptide-7 at about 2%. Argireline takes the largest share because it is the hardest of the three to deliver, not because it is the most important one. The other two are the pair that was studied together, and both benefit from the palmitic acid tail that helps them into skin's oily layers. Every one of those percentages is printed on the label.
The routine is simple. Three pumps before bed. The Watson serum data is the useful reminder here: the share of subjects who improved nearly doubled between month six and month twelve. That was their study on their formula, and the honest lesson is not a promised timeline but that peptides reward consistency far more than they reward impatience.
2. Wang Y, et al. Am J Clin Dermatol. 2013. DOI: 10.1007/s40257-013-0009-9
3. Schagen SK. Cosmetics. 2017. DOI: 10.3390/cosmetics4020016
4. Watson REB, et al. Br J Dermatol. 2009. DOI: 10.1111/j.1365-2133.2009.09216.x
5. Yang Y, et al. Skin Res Technol. 2024. DOI: 10.1111/srt.13790
