GHK-Cu: The Anti-Aging Copper Peptide with Over 100 Published Studies
- Durham Peptides
- Mar 27
- 3 min read
Updated: Apr 5
In a field dominated by large, complex peptides, GHK-Cu stands out as remarkably small — just three amino acids and a copper ion. Yet this naturally occurring tripeptide-copper complex has been the subject of more published research than almost any other peptide in the anti-aging and skin regeneration space, with over 100 studies spanning five decades.
What Is GHK-Cu?
GHK-Cu (glycyl-L-histidyl-L-lysine copper) is a naturally occurring peptide found in human blood plasma, saliva, and urine. It was first isolated in 1973 by biochemist Loren Pickart, who observed that plasma from younger donors caused older liver tissue to resume more youthful metabolic activity. When he traced the responsible component, he identified the GHK tripeptide and its copper complex.
The peptide has a simple structure — just three amino acids (glycine, histidine, and lysine) bound to a copper(II) ion. Despite this simplicity, GHK-Cu has been found to influence the expression of over 4,000 human genes, approximately 6% of the human genome. This was revealed through analysis using the Broad Institute's Connectivity Map, a database of gene expression responses to known compounds.
Plasma levels of GHK-Cu are highest in young adults (approximately 200 ng/mL) and decline significantly with age (dropping to approximately 80 ng/mL by age 60). This age-related decline has been a central focus of research interest.
What Has Been Studied?
The published research on GHK-Cu spans multiple areas. In skin biology, GHK-Cu has been studied for stimulation of collagen types I and III, elastin production and skin elasticity, fibroblast proliferation and directed cell migration, antioxidant enzyme upregulation (SOD, catalase), and wound closure and scar remodeling.
Beyond skin, researchers have also investigated GHK-Cu's effects on nerve outgrowth and neurotrophin production, bone tissue regeneration, hair follicle stimulation, and anti-inflammatory signaling.
A 2015 review published in BioMed Research International by Pickart, Vasquez-Soltero, and Margolina provided a comprehensive overview of GHK-Cu as a natural modulator of multiple cellular pathways in skin regeneration. A 2018 follow-up in the International Journal of Molecular Sciences examined GHK-Cu's regenerative and protective actions in light of new gene expression data.
The GLOW Blend Connection
Researchers interested in combining GHK-Cu with recovery peptides have driven demand for the GLOW Blend — a pre-blended formula combining GHK-Cu (50mg) with BPC-157 (10mg) and TB-500 (10mg) in a single 70mg vial. This combination has gained popularity in online longevity and skincare research communities.
Durham Peptides carries GHK-Cu individually (50mg) as well as the GLOW Blend (70mg) for researchers who want the convenience of a multi-peptide formulation.
Key Specifications
GHK-Cu from Durham Peptides is supplied as a lyophilized powder at 50mg per vial. It has a molecular formula of C₁₄H₂₃CuN₆O₄, a molecular weight of 403.92 g/mol, and a CAS number of 49557-75-7. It requires reconstitution with bacteriostatic water and should be stored at 2-8°C.
Selected Research References
Pickart L, Vasquez-Soltero JM, Margolina A. "GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration." Biomed Res Int. 2015. PMID: 26236730
Pickart L, Vasquez-Soltero JM, Margolina A. "Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data." Int J Mol Sci. 2018. PMID: 29986520
Pickart L. "The human tri-peptide GHK and tissue remodeling." J Biomater Sci Polym Ed. 2008. PMID: 18644225
All products mentioned in this article are sold by Durham Peptides for research and laboratory use only. They are not intended for human or animal consumption, diagnosis, treatment, cure, or prevention of any disease.
