Peptide Pharmacology

GHK-Cu

Contents

GHK-Cu is a naturally occurring copper peptide found in human plasma, saliva, and urine. It has been studied extensively for its role in tissue repair, skin health, and anti-inflammatory processes. Interest in GHK-Cu has grown due to its apparent ability to signal regeneration without overstimulating growth pathways.

What is GHK-Cu?

GHK is a small peptide comprised of three amino acids (glycine, histidine, and lysine). In fact, the GHK stands for the medical abbreviations of these three amino acids. GHK binds copper ions, forming GHK-Cu. Copper is essential for many enzymatic reactions related to healing and antioxidant defense. This copper-peptide complex has been demonstrated in research studies to act as a signaling molecule, directing cells toward repair and regeneration.

How Does GHK-Cu Work?

GHK-Cu influences gene expression related to tissue remodeling, collagen production, and inflammation control. It has been shown to stimulate fibroblasts, increase collagen and elastin synthesis, and promote angiogenesis. GHK-Cu also appears to reduce oxidative stress and inflammation. These factors have led to the research findings that GHK-Cu promotes skin rejuvenation and wound healing.

What is GHK-Cu Used for?

Common areas of research interest include:

GHK-Cu is also widely used in topical skincare formulations.

Side Effects of GHK-Cu

GHK-Cu is generally well tolerated, especially when used topically. Systemic safety data is more limited, but available research suggests low toxicity.

The most common side effect is injection site pain or reactions.

GHK-Cu Dosing Protocol (for Research)

While there is no established recommended dose, GHK-Cu research protocols call for injection under the skin (subcutaneous). One research/educational protocol is shown below:

Please note, GHK-Cu is also found in many topical creams. Its benefits in topical therapy have not been researched.

Recommended GHK-Cu Source (for Research)

References

Pickart L. The human tri-peptide GHK and tissue remodeling. J Biomater Sci Polym Ed. 2008;19:969-88. doi: 10.1163/156856208784909435.

Maquart FX, et al. Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+. FEBS Lett. 1988 Oct 10;238(2):343-6. doi: 10.1016/0014-5793(88)80509-x.

Pickart L, et al. Regenerative and protective actions of the GHK-Cu peptide in the light of the new gene data. Int J Mol Sci. 2018 Jul 7;19(7):1987. doi: 10.3390/ijms19071987.