Palmitoyl Tripeptide-1

Last Updated: August 2026

Palmitoyl Tripeptide-1 (INCI; also Pal-GHK, formerly grouped under palmitoyl oligopeptide) is a topical cosmetic peptide — the GHK tripeptide (glycyl-L-histidyl-L-lysine) with a palmitoyl (fatty-acid) chain attached to improve skin penetration. It is a matrikine (collagen-signaling peptide) and one of the two active peptides in the Matrixyl 3000 blend. It is a cosmetic ingredient, not an approved drug. Palmitoyl Tripeptide-1 sits in Peptigrity's skin and anti-aging peptides category.

What is Palmitoyl Tripeptide-1 and how does it work?

GHK is a naturally occurring copper-binding tripeptide fragment associated with tissue remodeling; palmitoyl tripeptide-1 is GHK palmitoylated for delivery, and it signals dermal fibroblasts to increase synthesis of collagen (types I, III, and IV) and fibronectin — supporting firmer, smoother-looking skin without the tissue trauma of stronger actives. It's the "synthesis" half of the Matrixyl 3000 logic.

How does it relate to GHK-Cu?

Both are built on the same GHK tripeptide, but they're different ingredients: GHK-Cu is the copper-complexed form, while palmitoyl tripeptide-1 is the palmitoylated (fatty-acid-linked) form optimized for topical penetration — so they share a peptide backbone but differ in modification, delivery, and typical use. See the GHK-Cu profile for the copper form.

What does the evidence show?

The in-vitro evidence that palmitoyl tripeptide-1 stimulates collagen and fibronectin is reasonable, and it functionally overlaps with Pal-KTTKS (Matrixyl) while accessing complementary pathways — but as a topical peptide its clinical effect is modest and much of the finished-product evidence comes as part of the Matrixyl 3000 blend rather than the isolated peptide. Evidence level: In-vitro reasonable; isolated-peptide clinical data limited; effect modest.

Is it safe, and how does Peptigrity verify the raw material?

Palmitoyl tripeptide-1 is well tolerated in topical use and pairs comfortably with other actives; as it's sold as a raw peptide for formulation, HPLC purity and mass-spec identity are the checks that confirm the correct Pal-GHK at the labeled amount. Peptigrity collects independent third-party Certificates of Analysis for Palmitoyl Tripeptide-1 from shops' official channels and verifies each for authenticity before publishing. Because shops choose which COAs to publish, results reflect the batches shops have made public rather than every production batch — a selection bias we state openly. A community-funded Testing Grant to purchase and test vials anonymously is in development. Tests in the database come from independent labs such as Janoshik Analytical, Freedom Diagnostics, and Chromate. The trust score weights lab purity and reviews equally (50/50). See how to read lab results. Compare bulk-ingredient vendors against the independent Palmitoyl Tripeptide-1 lab tests on file.

This section is for educational and informational purposes only and does not constitute medical advice. Palmitoyl Tripeptide-1 is not approved by the FDA or equivalent regulators as a drug; it is sold as a cosmetic ingredient and as a research compound. Always consult a qualified healthcare provider before using any peptide or research compound. Peptigrity is an independent review platform and does not sell, endorse, or recommend specific products or vendors.