GHK-Cu (Copper Peptide)

Description

What is GHK-Cu?

GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine, first isolated from human plasma. The peptide alone is C14H24N6O4 at 340.38 Da, and the copper complex is about 403.9 Da (calculated). Peptryn supplies it as a 100mg lyophilized laboratory material.

GHK-Cu specifications

Compound	GHK-Cu (copper tripeptide-1)
Size	100mg
Form	Lyophilized powder
Molecular weight	340.38 Da peptide alone; about 403.9 Da as the copper complex (calculated)
Formula	C14H24CuN6O4 (copper complex); C14H24N6O4 (peptide alone)
CAS number	49557-75-7
Solubility	Water-soluble

Lot testing and COA

The latest published report is for lot 2026-08-05: 99.93% purity by HPLC-UV-MS and a negative endotoxin result, tested by MZ Biolabs. The certificate links to the laboratory’s own report, so you can check it without relying on us.

GHK-Cu 100mg COA · COA Library

Ordering

Orders placed on peptryn.com ship from the USA with same-day dispatch, and shipping is free on orders over $150. For a question about a lot or a size, email [email protected].

Storage

Store lyophilized powder at -20°C, protected from light.

Frequently asked questions

What is GHK-Cu?

GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine, about 404 Da as the complex. Peptryn supplies it as a 100mg lyophilized laboratory material.

What purity is Peptryn’s GHK-Cu?

Peptryn’s GHK-Cu is verified at 99.93% purity by HPLC-UV-MS, tested by MZ Biolabs (lot 2026-08-05). Read the COA. HPLC purity is area percent, the share of the main peak among all detected peaks; see our guide to peptide purity for what that means.

How is GHK-Cu stored?

Store lyophilized powder at -20°C, protected from light.

What is GHK-Cu’s CAS number?

GHK-Cu’s CAS number is 49557-75-7. Molecular weight: 340.38 Da peptide alone; about 403.9 Da as the copper complex (calculated).

Is GHK-Cu for human use?

No. Peptryn sells it for laboratory research only, and it is not approved for human or veterinary use. We do not give dosing or administration guidance.

What is the difference between GHK-Cu and AHK-Cu?

They are related copper-binding tripeptides with different amino acid sequences. GHK-Cu is glycyl-L-histidyl-L-lysine, about 340 Da as the peptide and about 404 Da as the copper complex (calculated). AHK-Cu is Ala-His-Lys, about 354 Da as the peptide. Peptryn sells both.

Related: Glow peptide guide · What is a COA? · Peptide testing · Popular peptides

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For laboratory research use only. Not for human or veterinary use, and not a drug, food, dietary supplement or cosmetic. You must be 21 or older to buy.