GHK-Cu is the copper complex of the tripeptide glycyl-L-histidyl-L-lysine (GHK). GHK occurs naturally in human plasma, saliva and urine, and its levels fall with age.

What is GHK-Cu studied for?

GHK-Cu is studied in skin and wound-healing research, including collagen and elastin production, wound closure and tissue remodelling, and in studies of how it changes gene expression.

The copper ion gives both the powder and the reconstituted solution their blue color.

How is GHK-Cu tested?

Every batch goes to an independent lab. The current batch was tested across three vials for purity (RP-HPLC), identity (LC-MS), net peptide content, endotoxins, heavy metals and sterility. Each batch's certificate of analysis is published on the lab results page.

How should GHK-Cu be stored?

Keep the sealed vial in the refrigerator at 36–46°F (2–8°C), dry and away from light. As a freeze-dried powder it tolerates room temperature for weeks, which is why it ships without ice. Once reconstituted, keep it refrigerated between uses. More in our guide, Do peptides need to be refrigerated?

What sizes does GHK-Cu come in?

GHK-Cu comes as a blue lyophilized powder in 50mg and 100mg vials.

Is GHK-Cu for human use?

No. GHK-Cu is sold for laboratory research use only.

50mg–100mg · 99%+ Purity

GHK-CU

GHK-Cu (copper peptide) is a naturally occurring tripeptide-copper complex.

$38.00

COA Tested 99%+ Purity Research Grade

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99.819% purity View COA

Certificate of Analysis

GHK-Cu 50mg · 3 vials tested by an independent lab · RP-HPLC / LC-MS

Batch 2026-GH612

Latest

99.819%

Average purity

Labeled content: 50mg
Net content: 52.05mg (+4%)
Vials tested: 3
Endotoxins: Pass
Heavy metals: Pass
Microbial sterility: Pass
Method: RP-HPLC / LC-MS
Tested: Jul 16, 2026

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Batch GH556

99.67%

Average purity

Labeled content: 50mg
Net content: 56.54mg (+13%)
Vials tested: 1
Endotoxins: Pass
Method: HPLC-Uv
Tested: Apr 13, 2026

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Batch GH287

99.94%

Average purity

Labeled content: 50mg
Net content: 51.20mg (+2%)
Vials tested: 1
Endotoxins: Not Tested
Method: HPLC-UV
Tested: Jan 13, 2026

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Batch GH203

99.815%

Average purity

Labeled content: 50mg
Net content: 57.82mg (+16%)
Vials tested: 1
Endotoxins: Not Tested
Method: HPLC-UV
Tested: Nov 4, 2025

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Compound Information

Chemical and structural properties

What it is

What is GHK-Cu?

GHK-Cu (copper peptide) is a naturally occurring tripeptide-copper complex.

Class: Copper tripeptide complex
Also known as: Copper peptide, glycyl-L-histidyl-L-lysine copper
Form: Blue lyophilized powder
Use: Research use only

Molecular profile

Compound Structure

CAS number: 89030-95-5
Molecular formula: C14H21CuN6O4
Molecular weight: 400.9 g/mol
Amino acids: 3
Sequence: Gly-His-Lys

PubChem · CID 139035031

Storage

Storage & Stability

Store cold
Protect from light
Keep dry

Lyophilized (powder) 2–8°C (36–46°F) Refrigerate · −20°C for long-term storage

Reconstituted 2–8°C (36–46°F) Refrigerate · use within 28 days

Solubility: Soluble in bacteriostatic water

GHK-Cu Overview

The copper peptide: a natural tripeptide bound to copper, studied in skin and tissue-repair research.

Technical overview

GHK (Gly-His-Lys) was first identified in human plasma by Loren Pickart in 1973. It binds copper tightly, and the copper complex, GHK-Cu, is the form used in most research. Plasma levels fall with age, from about 200 ng/mL at 20 to about 80 ng/mL at 60.

Research applications

GHK-Cu is studied for collagen, elastin and glycosaminoglycan production, wound closure, skin and hair-follicle models, and gene-expression studies that link it to tissue remodelling and antioxidant pathways.

FAQs

What is GHK-Cu?

GHK-Cu is the copper complex of the tripeptide glycyl-L-histidyl-L-lysine (GHK). GHK occurs naturally in human plasma, saliva and urine, and its levels fall with age.
What is GHK-Cu studied for?

GHK-Cu is studied in skin and wound-healing research, including collagen and elastin production, wound closure and tissue remodelling, and in studies of how it changes gene expression.
Why is GHK-Cu blue?

The copper ion gives both the powder and the reconstituted solution their blue color.
How is GHK-Cu tested?

Every batch goes to an independent lab. The current batch was tested across three vials for purity (RP-HPLC), identity (LC-MS), net peptide content, endotoxins, heavy metals and sterility. Each batch's certificate of analysis is published on the lab results page.
How should GHK-Cu be stored?

Keep the sealed vial in the refrigerator at 36–46°F (2–8°C), dry and away from light. As a freeze-dried powder it tolerates room temperature for weeks, which is why it ships without ice. Once reconstituted, keep it refrigerated between uses. More in our guide, Do peptides need to be refrigerated?
What sizes does GHK-Cu come in?

GHK-Cu comes as a blue lyophilized powder in 50mg and 100mg vials.
Is GHK-Cu for human use?

No. GHK-Cu is sold for laboratory research use only.