GHK-Cu: What It Is and What It’s Known For

GHK-Cu is a copper peptide widely known in skin, collagen and anti-ageing research. Here’s what it is, what it’s known for, and what to look for when sourcing it.

What is GHK-Cu?

GHK-Cu is a naturally occurring copper peptide made up of three amino acids (glycine, histidine and lysine) bound to a copper ion. It’s present naturally in human plasma, though levels are known to decline with age. In research it’s supplied as a lyophilised powder with a distinctive blue tint from its copper content, and reconstituted before use.

What is it known for?

GHK-Cu is best known for its extensive role in skin and collagen research. It appears widely in studies exploring skin regeneration, collagen production, wound-healing models and cosmetic science, which is why it’s one of the most recognised peptides in the anti-ageing and skincare research space. It’s also studied for its antioxidant and tissue-remodelling properties.

Why it’s so widely researched

GHK-Cu has one of the longest research histories of any peptide, first isolated decades ago. Its combination of a well-understood structure and broad relevance to skin and tissue science means it remains a heavily studied compound and a common ingredient in cosmetic research formulations.

Properties researchers value

• Copper binding — the copper ion is central to its activity in research models, and gives the reconstituted solution its characteristic blue colour.
• Solubility — GHK-Cu reconstitutes readily in bacteriostatic water for straightforward laboratory preparation.
• Well-characterised — as a defined tripeptide-copper complex, its identity is confirmed by mass spectrometry against its expected molecular weight.

What to look for when sourcing

Identity and purity are what matter most. Look for an independent Certificate of Analysis (COA) confirming HPLC purity and molecular weight by mass spectrometry, from a named third-party laboratory rather than the seller.

Reconstitution

GHK-Cu is supplied lyophilised and dissolved into a solvent — usually bacteriostatic water — before measurement. Our guide on how to reconstitute research peptides covers the fundamentals.

Our approach

At Revial Labs, our GHK-Cu 100mg is independently COA tested so researchers can verify identity and purity before use. It also features in our Glow Stack research blend. Every compound we supply is intended strictly for laboratory research.

This article is provided for educational purposes for laboratory research professionals. All Revial Labs compounds are supplied strictly for laboratory research use only and are not for human or veterinary use.