What Is GHK-Cu?
GHK-Cu is the copper complex of the tripeptide Glycyl-L-Histidyl-L-Lysine (GHK). It occurs naturally in human plasma at concentrations of approximately 200 ng/mL in young adults, declining significantly with age. This age-related decline has made GHK-Cu a subject of intense interest in longevity and regenerative research.
First isolated by Loren Pickart in 1973, GHK-Cu has accumulated one of the most substantial and diverse research portfolios in peptide science — spanning wound healing, hair biology, anti-fibrotic effects, antioxidant activity, and broad gene expression modulation.
Mechanisms of Action
Collagen and ECM Synthesis
GHK-Cu is among the most potent studied stimulators of collagen synthesis in fibroblasts. Research documents upregulation of collagen types I, III, and IV, along with glycosaminoglycans and decorin — key components of the extracellular matrix (ECM). Simultaneously, GHK-Cu has been shown to modulate MMP activity, preventing excessive ECM degradation.
Antioxidant and Anti-Inflammatory Activity
GHK-Cu reduces oxidative stress via multiple pathways: it activates the Nrf2 pathway (upregulating antioxidant genes), chelates free copper to prevent Fenton reactions, and downregulates NF-κB-driven inflammatory gene expression. These effects contribute to its observed anti-inflammatory properties in wound models.
Gene Expression Modulation
One of the most remarkable aspects of GHK-Cu research is the breadth of its gene expression effects. Loren Pickart's computational analyses identified GHK-Cu as capable of resetting the gene expression patterns of damaged tissue toward those of healthier, younger tissue — affecting over 4,000 human genes. The most impacted pathways include inflammation, DNA repair, cell proliferation, and tissue remodeling.
Key Research Areas
| Area | Model | Key Observation |
|---|---|---|
| Wound Healing | Rat, in vitro | Accelerated closure, improved tensile strength |
| Collagen Production | Human fibroblasts | Significant upregulation of collagen I, III, IV |
| Hair Follicle Growth | Mouse, in vitro | Increased follicle size and proliferative activity |
| Anti-Fibrotic | Rat, in vitro | Reduced TGF-beta-driven fibrosis markers |
| DNA Repair | In vitro | Upregulation of DNA repair gene networks |
| Nrf2 Pathway | In vitro | Activation of antioxidant response elements |
Purity & Verification
Storage
GHK-Cu is moderately stable compared to other peptides but should still be stored at −20°C in lyophilized form. Protect from light. After reconstitution with bacteriostatic water, refrigerate at 2–8°C and use within 30 days.
For research use only. Not for human or animal use. Order GHK-Cu here.