GHK-Cu Explained: The Copper Peptide in Tissue Research
GHK-Cu is one of the smallest and most-studied peptides in tissue research: three amino acids holding a single copper ion. It was first identified in human plasma, and research has since linked it to collagen production, tissue remodeling and changes in gene expression. Here is what researchers study it for and how it fits with other repair peptides.
What GHK-Cu is
GHK is the tripeptide glycyl-L-histidyl-L-lysine. It binds copper(II) ions very tightly, and the copper complex, GHK-Cu, is the active form studied in most research. It was first isolated from human plasma in the 1970s, and plasma levels are reported to fall with age, one reason it attracts interest in aging and skin-repair research.
Why copper matters
Copper is a cofactor for enzymes involved in building and maintaining tissue, including lysyl oxidase, which cross-links collagen and elastin, and superoxide dismutase, an antioxidant enzyme. GHK can carry copper and deliver it to cells in a non-toxic form, which links it to these copper-dependent processes.
What it is studied for
- Extracellular matrix: collagen, elastin and glycosaminoglycan synthesis in fibroblast models
- Tissue remodeling: balance of matrix-building and matrix-degrading enzymes
- Gene expression: gene-profiling studies have reported broad shifts in expression linked to repair and antioxidant pathways
- Skin and wound models: keratinocytes, dermal fibroblasts and wound-closure assays
See the GHK-Cu research profile for structure and key studies.
GHK-Cu in blends
GHK-Cu is a core component of both our GLOW and KLOW blends, where it adds matrix and collagen signaling alongside the angiogenic and migration pathways of BPC-157 and TB-500. Our GLOW vs KLOW guide compares them, and blends vs single peptides covers when to use the single compound instead.
Handling notes
GHK-Cu powder is typically blue because of the bound copper, which is normal. Store sealed vials at -20°C away from light; see our storage guide. Every lot we sell is tested by Bioviridian Labs (ISO/IEC 17025, Texas) for HPLC purity, mass-spectrometry identity, endotoxin and heavy metals; see the COA Library.
For laboratory research use only. Not for human or veterinary use. This article summarizes published research for educational purposes and does not provide medical advice.