How to Read a GHK-Cu Certificate of Analysis (COA)
A Certificate of Analysis is only useful if you know which number on it matters for the compound in front of you. For GHK-Cu, the informative checks are not the same as for a generic short peptide.
In plain English
Peptide purity alone is not enough for this one. The informative number is copper content, ideally measured directly, confirming the intended ratio of peptide to metal. A report showing only purity describes the organic half of the molecule and says nothing about whether the copper is there in the right amount.
What GHK-Cu actually is
GHK-Cu is three amino acids holding onto a copper atom — and the copper is part of the molecule, not an additive. It was identified in human blood in 1973, and researchers noticed its levels fall considerably with age. It is the only compound here whose condition you can partly judge by looking at it.
Supplied for laboratory research use only — not for human or animal use.
Third-party tested by HPLC and LC-MS, ≥99% purity, with a Certificate of Analysis on every order. Ships across Canada.
Technical detail below
Assays that are informative for GHK-Cu
What to check on the COA
Peptide purity alone is insufficient for a coordination complex. The informative figure is copper content — ideally by ICP-MS or atomic absorption — confirming the intended peptide-to-copper stoichiometry. A COA reporting only HPLC purity describes the ligand while saying nothing about whether the metal is present in the right proportion.
Free (uncomplexed) GHK peptide, excess free copper salts, oxidised histidine species.
Verify a Popular Peptides batch
Every batch is third-party tested by HPLC and LC-MS with a published Certificate of Analysis (≥99% purity). Enter a lot number to pull the COA for the exact vial in front of you.
What GHK-Cu is studied for
The best-populated area of the GHK-Cu literature, examined in dermal fibroblast models.
Studied for effects on the MMP/TIMP balance governing matrix turnover.
Copper itself is an angiogenic cofactor, and the complex is studied in that context.
Plasma GHK falls substantially between early and later adulthood, a finding central to research interest in the molecule.
Summarizes published preclinical literature. Provided for research reference only; not a claim of efficacy or a description of human use.
More GHK-Cu reference
Lyophilized and reconstituted storage conditions, plus the practical working window.
Diluent selection, dissolution behaviour, and the calculator preset for this compound.
Which solvents work, why, and what abnormal dissolution behaviour indicates.
The specific chemical routes by which this molecule breaks down, and how to limit each.
Compound-specific bench practices, and the errors most often made with this molecule.
What to inspect on arrival, and which conditions actually warrant rejecting a vial.
Questions specific to this compound — structure, chemistry, and common misconceptions.
Purity & COA reference for other compounds
GHK-Cu is supplied strictly as a research chemical for in-vitro laboratory and research use only. It is not intended for human or animal consumption, diagnostic, or therapeutic use. This page is educational laboratory-handling reference information — not medical advice, not usage guidance, and not a protocol.