Palmitoyl tripeptide-1: evidence, FDA status and research

It is a skin cream ingredient sold to boost collagen and smooth wrinkles. The wrinkle claims come from the maker's own tests of a blend, not published studies.

Sold for

Palmitoyl tripeptide-1 is marketed as a collagen-boosting signal peptide and is one of the two actives in Matrixyl 3000.

Studies say

Published data cover safety only; the wrinkle claims rest on unpublished manufacturer testing of a blend, which is a D.

Why grade D. The peer-reviewed record identified is a 2018 industry safety assessment covering toxicity, not benefit. Efficacy claims come from the manufacturer's testing of the Matrixyl 3000 blend, in which this peptide is combined with palmitoyl tetrapeptide-7, and have not been published in a form that isolates it. No independent human trial exists in these sources. ¹

FDA. Palmitoyl tripeptide-1 is a cosmetic ingredient and is not approved by the FDA as a drug for any use. Cosmetic ingredients are regulated but not pre-approved. ²

Written from 2 cited sources. Fact-checked 2026-10-27: 7 claims checked, 0 corrected. Last refreshed 2026-10-27. Not physician reviewed.

What this means for you

What people take it for: Smoothing wrinkles
Can a US doctor prescribe it?: No prescription; it is a cosmetic ingredient.
Properly tested in people?: No meaningful testing published.

Evidence checklist

Randomised controlled trial No peer-reviewed efficacy trialno
Human study over 100 people No human efficacy studyno
More than one research group Efficacy claims from the maker onlyno
Clinical outcomes, not surrogate markers No clinical outcomeno
Human safety data beyond case reports 2018 CIR review found it safe in cosmeticsyes

Drawn from the cited studies below. A dash means the sources give no information.

What it is

Palmitoyl tripeptide-1 is the tripeptide glycine-histidine-lysine. This fragment is found in collagen breakdown products. A palmitic acid tail is attached so it can cross the oily outer skin layer. The same GHK sequence bound to copper, not to a fatty acid, is GHK-Cu. Researchers have studied GHK-Cu more. Sederma sells the palmitoyl form as Pal-GHK. It mixes it with palmitoyl tetrapeptide-7 in Matrixyl 3000. ¹

Cosmetic labels list it under its INCI name. Some list it as palmitoyl oligopeptide. That is an older name, and it has caused confusion with unrelated ingredients. In the United States it is a cosmetic ingredient with no drug approval. ¹²

How it works

GHK is a matrikine. This is a fragment released when collagen breaks down. It signals fibroblasts to make new matrix. The maker reports that the palmitoyl form increases production of type I and III collagen and fibronectin in cultured fibroblasts. Those cell experiments appear in supplier literature. We have not found a peer-reviewed study of this palmitoylated peptide in human skin. ¹

What human research shows

We have not found a published controlled trial of palmitoyl tripeptide-1 alone in people. The clinical results quoted for Matrixyl 3000 come from the maker's own tests of the two-peptide blend. They include less wrinkle depth and roughness over two months. Published studies that include the blend test it inside finished products with many ingredients. Those studies cannot tell you what this peptide adds. ¹

Study	Model	Finding
CIR safety assessment 2018	Expert panel review of toxicology and use concentration data	Tripeptide-1 and its fatty acyl derivatives judged safe in cosmetics at present practices of use. ¹
FDA cosmetic regulation	Regulatory document	Cosmetic ingredients are not approved before sale; the manufacturer is responsible for safety and claims. ²

Safety

The Cosmetic Ingredient Review panel reviewed tripeptide-1 and its fatty acyl derivatives in 2018. That includes the palmitoyl form. It concluded they are safe in cosmetics at current use concentrations. No specific adverse reactions have been reported. The review covers safety. It says nothing about whether the ingredient works. ¹

Questions for your clinician

Is there independent evidence that this ingredient works on its own?
How is it different from the blend it is sold in?
Which skin treatments have controlled trials behind them?

Questions people ask

Is palmitoyl tripeptide-1 the same as GHK-Cu?

Same three amino acids, different partner. GHK-Cu carries a copper ion. It has its own body of research, mostly in cell and animal models plus a few small human studies. Palmitoyl tripeptide-1 carries a fatty acid to help it penetrate. It has almost no independent published data. ¹

Does it stimulate collagen?

In cultured cells, according to the maker. No published trial has shown that a cream delivers enough to living dermis to change collagen in people. ¹

Why is it in so many products if the evidence is thin?

Matrixyl 3000 is cheap and well tolerated. It has a safety review behind it and a name people know. Those are business reasons. The evidence that it affects wrinkles is still the maker's own testing. ¹²

Citations

Cosmetic Ingredient Review 2018, Int J Toxicol: safety assessment of tripeptide-1, hexapeptide-12, their metal salts and fatty acyl derivatives, and palmitoyl tetrapeptide-7 pure.psu.edu
FDA: how cosmetics are not FDA-approved but are FDA-regulated fda.gov