Description

GHK-Cu Peptide Overview

GHK-Cu Peptide is a naturally occurring copper-binding peptide complex consisting of the tripeptide glycyl-L-histidyl-L-lysine (GHK) associated with a copper(II) ion. It is widely researched in peptide chemistry, skin biology, tissue-response research, copper-dependent cellular processes, and cosmetic formulation science.

GHK-Cu has attracted considerable scientific interest because the GHK peptide can bind copper and form a biologically relevant peptide–metal complex. Researchers have investigated this complex in areas involving extracellular matrix biology, cellular signaling, oxidative processes, and skin-related research.

Research Use Only: GHK-Cu Peptide is supplied for laboratory and scientific research purposes only. It is not intended for human or veterinary administration, diagnosis, treatment, cure, or prevention of disease.

What Is GHK-Cu Peptide?

GHK-Cu stands for Glycyl-L-Histidyl-L-Lysine Copper, commonly called copper tripeptide-1.

The GHK portion is a naturally occurring three-amino-acid peptide:

Gly-His-Lys

It can form a complex with Cu²⁺ (copper II), producing the copper peptide commonly referred to as GHK-Cu.

Research into GHK-Cu has covered areas such as:

• Peptide–metal interactions
• Copper-dependent biology
• Skin and extracellular matrix research
• Cellular signaling
• Oxidative-stress research
• Tissue-response studies
• Cosmetic formulation research
• Peptide stability and characterization

GHK-Cu is also frequently investigated as a model system for understanding how small peptides interact with metal ions.

Research findings depend on the experimental model, concentration, formulation, and study conditions. Laboratory findings should not automatically be interpreted as demonstrated clinical effects.

Molecular Formula, Molecular Weight & Sequence

GHK-Cu is a peptide–metal complex, so its chemical specifications should distinguish the GHK peptide from the copper-containing complex.

Commonly reported specifications for GHK-Cu (Copper Tripeptide-1) include:

The molecular weight of the GHK peptide alone is different from the molecular weight of the copper-containing complex.

Why this distinction matters

GHK-Cu should not be treated as simply an ordinary peptide because its chemical identity includes a copper ion coordinated with the peptide.

For quality control, researchers should compare:

GHK sequence → copper content/complex → molecular formula → calculated mass → analytical result

against the batch-specific COA.

This is particularly important when comparing suppliers because products can be described using different naming conventions.

Purity

A suitable research-grade specification for GHK-Cu Peptide may be:

Purity: ≥98% by HPLC

However, purity reporting for a peptide–metal complex should be interpreted together with the analytical documentation.

A professional COA may include:

• HPLC purity
• HPLC chromatogram
• Mass spectrometry where applicable
• Copper content or elemental analysis where applicable
• Molecular-weight information
• Lot/batch number
• Testing date
• Net quantity

For research purposes, always rely on the batch-specific COA rather than treating a general product-page specification as a substitute for analytical testing.

Appearance

Appearance: Blue to blue-green or blue-purple lyophilized powder, depending on the formulation and manufacturing process.

The characteristic coloration is associated with the presence of the copper complex.

Minor differences in shade or powder texture can occur between batches.

Visual appearance alone cannot confirm identity, copper content, or purity. Appropriate analytical testing should be used when confirmation is required.

Available Vial Sizes

GHK-Cu Peptide can be offered in several research quantities depending on laboratory and formulation requirements.

Common vial sizes include:

• 10 mg
• 20 mg
• 50 mg
• 100 mg
• 500 mg

For many small-scale laboratory and formulation projects, 10 mg, 20 mg, and 50 mg formats can be practical research quantities.

Larger quantities may be appropriate for formulation development or laboratories conducting repeated experiments.

Always clearly state the net amount of GHK-Cu complex per vial on your product page and label.

Storage Recommendations

Proper storage helps maintain the quality and stability of GHK-Cu.

For lyophilized material:

• Follow the storage conditions provided with the specific batch.
• Keep the vial tightly sealed.
• Protect from excessive moisture.
• Minimize exposure to excessive heat.
• Protect from unnecessary direct light.
• Avoid repeated temperature cycling.
• Allow a cold vial to equilibrate appropriately before opening to reduce condensation.

Because GHK-Cu contains a copper ion, formulation and storage conditions can influence stability.

For long-term storage, researchers should follow the manufacturer’s validated stability recommendations.

Important: Exact storage requirements can vary according to formulation, packaging, concentration, and stability data. The batch-specific documentation should take priority.

Reconstitution Information

GHK-Cu Peptide is supplied as a lyophilized research material.

Reconstitution should be performed according to the laboratory’s intended application and validated experimental protocol.

General considerations include:

1. Allow the sealed vial to equilibrate appropriately before opening.
2. Select a solvent compatible with the intended experiment.
3. Add the solvent carefully.
4. Avoid unnecessarily vigorous agitation.
5. Allow adequate time for dissolution.
6. Minimize excessive foaming.
7. Record the solvent and final concentration.
8. Consider aliquoting when appropriate to reduce repeated freeze–thaw exposure.

Because GHK-Cu is a peptide–copper complex, researchers should consider factors such as pH, ionic strength, solvent composition, and concentration when developing a formulation.

There is no universal reconstitution volume appropriate for every GHK-Cu experiment.

Researchers should establish preparation conditions according to their validated laboratory procedure.

Intended Use — Research Use Only

GHK-Cu Peptide is intended for laboratory, scientific, and formulation research.

Potential research applications include:

• Peptide–metal interaction studies
• Skin biology research
• Extracellular matrix research
• Cosmetic formulation research
• Copper-dependent cellular studies
• Peptide stability investigations
• Analytical chemistry

This product should not be marketed as:

• An injectable treatment
• A prescription medicine
• A dietary supplement
• A guaranteed anti-aging treatment
• A treatment for hair loss or skin disease

Research Use Only. Not for Human or Veterinary Administration.

Researchers and formulation professionals are responsible for complying with applicable regulatory and laboratory requirements.

Packaging & Shipping Information

GHK-Cu Peptide should be packaged appropriately to protect the lyophilized material during transportation.

Professional research packaging may include:

• Securely sealed vial
• Product identification label
• Net quantity
• Lot/batch number
• Research-use-only statement
• Protective secondary packaging
• Batch-specific COA or analytical documentation, where applicable

Upon receipt, inspect the package and vial for visible damage.

Before placing the material into laboratory inventory, verify:

Product name + quantity + lot number + chemical form + COA

Shipping conditions should follow the applicable stability requirements and relevant transportation regulations.

Frequently Asked Questions About GHK-Cu Peptide

What is GHK-Cu Peptide?

GHK-Cu is a copper-containing complex of the naturally occurring tripeptide glycyl-L-histidyl-L-lysine (GHK) and a copper(II) ion.

What does GHK stand for?

GHK represents the three amino acids:

Glycine – Histidine – Lysine

What is the sequence of GHK-Cu?

The peptide portion is:

GHK

or:

Gly-His-Lys

What is the molecular formula of GHK-Cu?

A commonly reported molecular formula for copper tripeptide-1 is:

C₁₄H₂₄CuN₆O₄

What is the molecular weight?

The reported molecular weight of the copper complex is approximately:

340.9 g/mol

Why is GHK-Cu blue?

The blue coloration is associated with the copper-containing complex and its interaction with the peptide.

What is GHK-Cu researched for?

Researchers investigate GHK-Cu in areas including peptide–metal interactions, skin biology, extracellular matrix research, copper-dependent processes, and cosmetic formulation science.

What purity should researchers look for?

A research-grade product may specify ≥98% purity by HPLC. The exact batch result should be confirmed using the COA.

Should GHK-Cu come with a COA?

Yes, batch-specific analytical documentation is valuable for professional research. Where available, researchers should review HPLC, identity testing, copper-content information, molecular-weight data, and lot details.

How should GHK-Cu be stored?

Follow the storage conditions supplied with the specific batch. Protect the lyophilized material from moisture, excessive heat, unnecessary light exposure, and repeated temperature cycling.

How is GHK-Cu reconstituted?

Reconstitution depends on the experimental application, solvent compatibility, concentration, and formulation conditions. There is no universal reconstitution volume suitable for every experiment.

Is GHK-Cu the same as GHK?

Not exactly. GHK is the three-amino-acid peptide, while GHK-Cu refers to the copper-containing complex of GHK.

Is GHK-Cu intended for injection?

A research-grade GHK-Cu product should not be presented as an injectable product. It is supplied for laboratory and formulation research.

Key Takeaway

GHK-Cu Peptide, also known as Copper Tripeptide-1, is a copper-containing complex of the tripeptide Gly-His-Lys.

Key commonly reported specifications include:

• Peptide sequence: GHK
• Molecular formula: C₁₄H₂₄CuN₆O₄
• Molecular weight: approximately 340.9 g/mol
• Purity: ≥98% by HPLC as a potential research-grade specification
• Appearance: Blue to blue-green/blue-purple lyophilized powder, depending on formulation

Because GHK-Cu is a peptide–metal complex, professional quality control should consider both peptide identity and copper-associated analytical information.

Researchers should verify the specific batch using its COA, including purity, identity, molecular-weight information, and any available copper-content testing.

A high-quality product page should provide accurate specifications, transparent documentation, appropriate storage information, and clear research-use labeling.

Research Use Only. Not for Human or Veterinary Administration.

Continue Learning: If you found this guide helpful, you may also want to read our previous peptide education articles covering the below topics

• What Bacteriostatic Water Should I Use For My Peptide?
• What’s Peptide Reconstitution?
• How Long Do Peptides Last?
• How Should Peptides Be Stored?
• How do I read a COA?
• Are peptides safe?
• Peptide Bubbles after reconstitution?
• Which peptide suppresses appetite the most?

Scientific Reference: For additional peer-reviewed information on peptide stability, sterile preparation, and pharmaceutical reconstitution practices, visit

PubMed

National Center for Biotechnology Information (NCBI)