GHK-Cu: Copper Tripeptide Research Overview

GHK is a naturally occurring tripeptide — glycyl-L-histidyl-L-lysine — found in human plasma. Its notable chemical property is a high affinity for copper(II) ions, forming the chelate commonly written GHK-Cu. The free tripeptide has formula C14H24N6O4 and molecular weight approximately 340.4 g/mol; the copper complex is commonly reported around 401-403 g/mol.

Because the copper ion is integral to the complex, GHK-Cu research is as much coordination chemistry as peptide chemistry, and the copper contribution is part of what is being studied.

Published work investigates GHK and GHK-Cu as modulators of gene expression networks associated with tissue remodeling and wound repair, as participants in antioxidant and anti-inflammatory signaling, and as stimulators of collagen and glycosaminoglycan synthesis and angiogenesis in model systems.

A 1990 study in Advances in Experimental Medicine and Biology examined the effect of glycyl-histidyl-lysyl chelated Cu(II) on ferritin-dependent lipid peroxidation in a cell-free system — a concrete example of the antioxidant-chemistry line of investigation.

The gene-expression literature includes a 2015 Biomed Research International paper on GHK as a modulator of cellular pathways in skin regeneration, a 2017 Brain Sciences paper on gene expression relevant to nervous system function, and a 2012 Oxidative Medicine and Cellular Longevity paper on oxidative stress and degenerative conditions of aging. Readers should note that much of this primary literature is authored by L. Pickart, who originally described the peptide.

More recent work includes a rodent study reporting behavioral and hippocampal effects in middle-aged mice, and a 2026 materials-science paper describing a copper-peptide cascade-catalysis system for infected diabetic wound healing.

GHK-Cu is genuinely widely used in topical cosmetic formulation. For systemic or tissue-repair applications, the evidence remains mechanistic, in vitro, animal, and correlational; no controlled human efficacy trials for non-cosmetic use were identified.

GHK-Cu appears in cosmetic products under cosmetic regulation. It is not an FDA-approved drug for any indication. Research-grade GHK-Cu supplied by North Summit Labs is a laboratory material, not a cosmetic product and not a medicine.

Supplied lyophilized in a sealed vial, typically with the characteristic blue coloration of the copper complex. Keep sealed and dry, equilibrate before opening, reconstitute with a solvent appropriate to the assay, and be aware that copper complexes can be sensitive to pH and to chelating buffer components — choose buffers deliberately. Aliquot to avoid repeated freeze-thaw cycles.

This monograph summarizes published scientific literature for educational and reference purposes only. It is not medical, veterinary, clinical, or dosing guidance, and nothing here should be read as a claim that this compound is safe, effective, or approved for use in humans or animals.

Material supplied by North Summit Labs is intended strictly for in-vitro laboratory research by qualified professionals. It is not a drug, supplement, food, cosmetic, or medical device, and it is not for human or animal consumption. Investigators are responsible for complying with their own institutional oversight, biosafety, and legal requirements.