GHK-Cu

Overview

GHK-Cu (Glycyl-L-Histidyl-L-Lysine Copper Complex) is a naturally occurring tripeptide-copper complex found in human plasma, saliva, and urine. Plasma levels decline significantly with age, from approximately 200 ng/mL at age 20 to 80 ng/mL by age 60, correlating with diminished regenerative capacity.

Mechanism of Action

GHK-Cu functions as a biological signal that activates tissue remodeling processes. It stimulates collagen and glycosaminoglycan synthesis in fibroblasts, promotes decorin production for organized collagen architecture, enhances angiogenesis, and recruits immune cells to damaged tissue. The copper ion serves as an essential cofactor for lysyl oxidase and superoxide dismutase, linking GHK-Cu to both structural remodeling and antioxidant defense.

Research Context

Over 60 published studies document GHK-Cu effects on wound healing, skin remodeling, hair follicle stimulation, and anti-inflammatory signaling. Gene expression studies using the Broad Institute Connectivity Map have shown that GHK-Cu modulates expression of over 4,000 genes, with a pattern that shifts gene expression toward a younger, healthier profile.

Key Research Areas

Considerations for Researchers

GHK-Cu is highly affordable due to its small size and straightforward synthesis. The copper complex gives it a characteristic blue color in solution. Store lyophilized at room temperature or refrigerated. Reconstituted solutions should be used promptly or refrigerated.