GHK-Cu

What Is GHK-Cu?

GHK-Cu is a small peptide made of three amino acids, glycine, histidine, and lysine, that naturally binds to a copper ion. It was first identified in human blood plasma in the 1970s by researcher Loren Pickart, who noticed that plasma from younger donors caused older liver cells in the lab to behave in a more youthful way.

The peptide occurs naturally in the body and is present in blood, saliva, and urine, but its levels decline steadily with age. Since that early discovery, most GHK-Cu research has focused specifically on skin and tissue remodeling, since the copper it delivers plays a role in enzymes involved in building and maintaining connective tissue. It's studied in both topical and injectable research formats.

What GHK-Cu Is Being Researched For

• Skin Structure and Collagen

  The largest area of GHK-Cu research looks at its effect on collagen, elastin, and other structural proteins that make up the skin's supportive matrix.^[1]

• Tissue Remodeling

  Beyond skin specifically, research has looked at GHK-Cu's role in remodeling connective tissue more broadly, including studies on wound healing and tissue repair in other organs.^[1]

• Gene Expression Research

  A more recent area of interest is how GHK-Cu affects gene activity at a broad scale. A widely cited review found it influences the expression of a large portion of genes measured in a major genomic database.^[1]

How GHK-Cu Works

• Delivering Copper to Tissue-Building Enzymes

  Research points to GHK-Cu's main role being copper delivery. It carries copper to enzymes like lysyl oxidase, which is involved in cross-linking collagen fibers so that skin and connective tissue hold their structure.^[1]

• Supporting Structural Protein Production

  Research points to GHK-Cu signaling skin cells called fibroblasts to increase their production of collagen and related structural proteins, while also regulating the enzymes that break down old or damaged tissue, which together are thought to support the skin's ongoing rebuilding process.^[1]

Reconstitution and Handling

GHK-Cu is typically supplied as a lyophilized powder in a sealed vial and reconstituted with bacteriostatic water before use in a research setting. Water should be added slowly rather than injected directly into the powder, and the vial should be swirled, not shaken.

Since the amount of water used affects the concentration of the final solution, researchers often use a dosage calculator to work this out before mixing. Once reconstituted, the solution is kept refrigerated to help preserve its stability.

Key Takeaways

GHK-Cu stands out for being a naturally occurring peptide with one of the longer and more human-relevant research histories in this space, centered mainly on skin structure and tissue remodeling. Its core mechanism involves delivering copper to enzymes that build and maintain connective tissue, alongside a broader signaling role in skin cell activity. Much of the foundational research traces back to its original discoverer, which is worth keeping in mind when weighing the literature.

Frequently Asked Questions

Sources and Research

1. Pickart L, Margolina A. Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data. Int J Mol Sci. 2018;19(7):1987.