GHK-Cu

What is GHK-Cu?

GHK was first isolated from human plasma in 1973 by Loren Pickart, who observed that it bound copper with high affinity. The tripeptide-copper complex — GHK-Cu — is among the most-studied small peptides in dermatology and regeneration research and is unusual in this catalog for being endogenous: the body makes it. Reconstituted GHK-Cu solution is a distinctive blue, a visual signature of the copper complex.

What is GHK-Cu studied for in research?

• Collagen and connective-tissue synthesis. Foundational fibroblast-culture work reported stimulation of collagen synthesis by the copper complex [1]; an in-vivo study reported connective-tissue accumulation [2].
• Skin regeneration pathways. Reviews collect GHK's studied role as a modulator of multiple cellular pathways in skin [3].
• Gene expression and ageing models. Later work matched GHK against large gene-expression datasets [4] and reviewed its studied role in oxidative-stress and degenerative models [5].

Cell, animal and dataset findings only — not claims of human effect.

Specifications, purity and documentation

Identity by mass spectrometry, purity by HPLC, batch-specific COA in every order. The COA reports the peptide; copper content is inherent to the complex as supplied. How to read the COA →

GHK-Cu — frequently asked

Further reading

• How to Read a Peptide Certificate of Analysis (COA) — Every APX Labs order ships with a batch-specific COA. This is how to read it — and how to tell a real one from a decorative one.
• How to Reconstitute Lyophilized Peptides for Laboratory Use — Lyophilized peptides arrive as a dry cake in a sealed vial. Turning that into a solution of known concentration is simple, but the details protect the material.
• How to Store Research Peptides: Lyophilized, Reconstituted and Pre-Filled — Peptides degrade by hydrolysis, oxidation and aggregation. Cold, dark and dry slow all three. The practical rules, by format.