GHK-Cu: A Complete Guide to the Copper Peptide

GHK-Cu is one of the most thoroughly characterised peptides in both biological and cosmetic-science research, which makes it a useful compound to understand in depth. This guide covers what GHK-Cu is, its copper-binding structure, the pathways it is studied in, and how it is handled in the lab.

What Is GHK-Cu?

GHK-Cu is glycyl-L-histidyl-L-lysine bound to a copper(II) ion — a naturally occurring copper-peptide complex. The GHK tripeptide was first identified in human plasma and has since been found in other biological fluids including saliva and urine. Because it occurs naturally and has been studied for decades, GHK-Cu is among the best-characterised peptides in this category.

The defining structural feature is the copper. GHK has a high affinity for copper ions, and the GHK-copper complex — not the bare tripeptide — is the form most research focuses on, because copper transport is central to the pathways it is examined in.

How Does GHK-Cu Work?

In the literature, GHK-Cu is studied for its interaction with:

• Copper transport and delivery — copper is a cofactor for numerous enzymes, and GHK is studied as a carrier and modulator.

• Extracellular-matrix and tissue-remodelling pathways — the cellular processes that organise and renew connective tissue, including signalling around matrix proteins.

• Gene-expression studies — GHK-Cu appears in research examining broad shifts in expression patterns related to tissue organisation.

It is also one of the most-studied peptides in cosmetic-science research, which is a large part of why the literature on it is so deep.

GHK-Cu Forms and Handling

• Format: lyophilised powder, and in some catalogues topical research formulations within cosmetic-science contexts.

• Purity: greater than or equal to 99% by HPLC.

• COA: per batch.

• Storage: frozen for long-term stability; protected from light, as copper complexes can be light-sensitive.

Frequently Asked Questions

What is GHK-Cu?

A naturally occurring copper-peptide complex — the tripeptide glycyl-L-histidyl-L-lysine bound to copper — first identified in human plasma.

Why is the copper important?

The copper-bound complex, not the bare GHK tripeptide, is the form most research centres on, because copper transport is central to the pathways studied.

Where was GHK-Cu first found?

In human plasma, and later in other biological fluids such as saliva and urine.

What purity should GHK-Cu be?

Greater than or equal to 99% by HPLC with a per-batch COA; stored protected from light.

These products are supplied strictly for laboratory and research use only. Not for human or animal consumption.