Is GHK-Cu the same as 'copper peptide'?

Yes. 'Copper peptide' in skincare and research contexts almost always refers to GHK-Cu (glycyl-L-histidyl-L-lysine copper complex). It is the most studied copper-binding peptide in humans. You may also see it written as GHK copper, copper tripeptide-1, or simply GHK. All refer to the same molecule.

What is GHK-Cu used for in skincare?

GHK-Cu is used topically in cosmetic formulations to stimulate collagen and elastin synthesis, reduce fine lines, and accelerate skin repair. It is classified as a cosmetic ingredient (not a drug) in the US. Human studies show improvement in skin density, firmness, and wrinkle depth. Unlike many peptide ingredients, it has peer-reviewed human evidence — though most trials are small.

Can GHK-Cu be injected?

Injectable GHK-Cu is used in research and has been explored for wound healing and hair loss. It is not FDA-approved for any injectable therapeutic use. Injectable preparations sold online are unregulated research compounds with no pharmaceutical oversight. Topical use is the only context with established cosmetic regulatory status.

Content reviewed by clinical research staff

Last reviewed: March 2026Sources: PubMed, FDA, WADA Prohibited List

Evidence graded using the PeptideScholar A-D system.

GHK-Cu

Copper-binding tripeptide3 amino acids

BHuman Studies

Excellent Credibility

3 cited studies | Evidence level B

Cosmetic Ingredient

GHK-Cu (copper peptide, GHK copper) is a naturally occurring copper complex of the tripeptide glycyl-L-histidyl-L-lysine. Found in human plasma, saliva, and urine, its concentration declines with age.

Mechanism of Action

Binds copper(II) ions and delivers them to tissues. Stimulates collagen, elastin, and glycosaminoglycan synthesis. Activates proteasome activity and modulates gene expression of over 4,000 genes.

Benefits

Clinically demonstrated skin rejuvenation and wrinkle reduction^[1]
Accelerated wound healing in human studies^[2]
Stimulates collagen and elastin synthesis^[1]
Anti-inflammatory and antioxidant activity^[3]

This content is for informational purposes only and does not constitute medical advice.

GHK-Cu - Dosing in Published Research

Reported routes: Topical, Subcutaneous injection

Used topically in cosmetic products at concentrations of 0.01-1%. Injectable research doses typically 1-2 mg/day in studies.

The dosing information above is sourced from published research literature and clinical trials. These are not recommendations. Individual responses vary. Always consult a healthcare provider before considering any peptide-based therapy.

Side Effects

Mild skin irritation with topical use^[1]
Temporary skin redness^[1]
Rare allergic reactions^[1]
Minimal systemic side effects with topical application

Interested in GHK-Cu products?

GHK-Cu is available in cosmetic formulations. Look for products with clinical-grade copper peptide concentrations.

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Research & Evidence

ReviewPMID: 26236730

GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration.

Biomed Res Int, 2015

Comprehensive review of GHK-Cu in skin regeneration showing stimulation of collagen, decorin, and glycosaminoglycans

ReviewPMID: 29986520

Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data.

Int J Mol Sci, 2018

GHK-Cu accelerated wound closure and increased angiogenesis in human skin studies

ReviewPMID: 35083444

The potential of GHK as an anti-aging peptide.

Aging Pathobiol Ther, 2020

GHK-Cu modulated expression of genes related to antioxidant, anti-inflammatory, and repair pathways

Compare GHK-Cu With

GHK-Cu vs BPC-157

GHK-Cu vs TB-500

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References

1.GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration.. Biomed Res Int, 2015. "Comprehensive review of GHK-Cu in skin regeneration showing stimulation of collagen, decorin, and glycosaminoglycans" [PMID: 26236730]
2.Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data.. Int J Mol Sci, 2018. "GHK-Cu accelerated wound closure and increased angiogenesis in human skin studies" [PMID: 29986520]
3.The potential of GHK as an anti-aging peptide.. Aging Pathobiol Ther, 2020. "GHK-Cu modulated expression of genes related to antioxidant, anti-inflammatory, and repair pathways" [PMID: 35083444]

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GHK-Cu FAQ

Medical Disclaimer

This content is for informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment recommendations.

Always consult a qualified healthcare provider before starting, stopping, or modifying any treatment. Do not disregard professional medical advice based on information found on this site.

No claims of therapeutic efficacy are made for substances that are not FDA-approved for the discussed indications. Research citations reflect published findings and do not imply endorsement.

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