Palmitoyl Tetrapeptide-7

Palmitoyl Tetrapeptide-7 (INCI; trade name Rigin; also Pal-GQPR) is a topical cosmetic peptide — a four-amino-acid sequence (Gly-Gln-Pro-Arg) derived from the constant region of immunoglobulin G, with a palmitoyl chain for skin penetration. Unlike the collagen-stimulating matrikines, it works on the anti-inflammatory side, and is one of the two peptides in the Matrixyl 3000 blend. It is a cosmetic ingredient, not an approved drug. Palmitoyl Tetrapeptide-7 sits in Peptigrity's skin and anti-aging peptides category.

What is Palmitoyl Tetrapeptide-7 and how does it work?

It suppresses the overproduction of interleukin-6 (IL-6) and related pro-inflammatory cytokines — the low-grade inflammation of "inflammaging" that both reduces fibroblast collagen synthesis and drives MMP breakdown of the extracellular matrix — so by damping IL-6 it addresses the degradation side of the collagen balance. This is the complement to a synthesis-stimulating peptide like palmitoyl tripeptide-1, which is why the two are paired in Matrixyl 3000.

What does the evidence show?

The mechanistic and in-vitro rationale (IL-6 suppression, reduced inflammatory ECM degradation) is coherent, but as with most cosmetic peptides the isolated clinical evidence is limited and much of the finished-product data comes from the Matrixyl 3000 blend and its manufacturer — so expect a modest, supportive, anti-inflammatory contribution rather than a dramatic standalone effect.

Evidence level: In-vitro/mechanistic; isolated clinical data limited; effect modest

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

Palmitoyl tetrapeptide-7 is well tolerated in topical use; sold as a raw peptide for formulation, HPLC purity and mass-spec identity confirm the correct Pal-GQPR at the labeled amount. Peptigrity collects independent third-party Certificates of Analysis for Palmitoyl Tetrapeptide-7 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 Tetrapeptide-7 lab tests on file.

This section is for educational and informational purposes only and does not constitute medical advice. Palmitoyl Tetrapeptide-7 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.

Frequently asked questions