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GHK-Cu

From PeptidePlaza, the free peptide reference · Entry #009 · Anti-Aging · Hand-curated entry · Editorial standards

Research warning. GHK-Cu is a naturally occurring endogenous peptide. Copper accumulation risk is theoretical at supranormal doses. Monitor copper/zinc balance in chronic research protocols.

GHK-Cu (also known as Copper tripeptide-1, GHK, Iamin) is a anti-aging research peptide. A naturally occurring tripeptide-copper complex found in human plasma, saliva, and urine. Plasma levels decline sharply with age. Extensively studied for collagen induction, skin remodeling, and gene expression regulation.

GHK-Cu is a naturally occurring tripeptide (Gly-His-Lys) complexed with copper (Cu²⁺). It is found in human plasma at ~200 ng/mL at age 20, declining to ~80 ng/mL by age 60. GHK has a high affinity for copper (Kd ~10⁻¹⁴ M). It promotes collagen synthesis, upregulates antioxidant enzymes (superoxide dismutase, catalase), activates skin fibroblasts, and stimulates VEGF-driven angiogenesis. Gene expression analysis shows GHK-Cu modulates over 4,000 human genes, including upregulation of anti-aging and tissue repair pathways and downregulation of inflammation and cancer-associated genes.

1 Mechanism of action

Cu²⁺ chaperone and wound healing signal. Activates fibroblasts, upregulates collagen I, III, and IV synthesis; stimulates VEGF and FGF-7; activates superoxide dismutase; modulates TGF-β signaling.

Primary targets: Integrin αvβ3 (proposed) · TGF-β pathway

2 Reported effects

Effects below are those reported in the published literature cited on this page. They are not claims of clinical benefit and not medical advice.

2.1 Reported benefits

  • Modulates over 4,000 human genes toward tissue repair/anti-aging profile
  • Stimulates collagen I, III, IV and elastin synthesis
  • Upregulates antioxidant enzymes (SOD, catalase)
  • Anti-inflammatory via downregulation of NF-κB and TGF-β pathways

2.2 Side effects

  • Copper overload risk with excessive dosing (rare)
  • Topical irritation in some skin types
  • Minor stinging upon injection
  • Temporary blue-green discoloration at injection site (copper deposition)

3 Chemical and physical properties

CAS number89030-95-5
Molar mass340.38 g/mol (free peptide)
Purity (typical)>99.0%
Half-life~30 min (plasma)
Storage−20 °C, lyophilised powder, desiccated
SolubilitySterile water / bacteriostatic water
Receptors / targetsIntegrin αvβ3 (proposed), TGF-β pathway

3.1 Amino acid sequence

Gly-His-Lys

4 Research dosages

1–5 mg SC daily to 3x weekly; 0.01–0.1% topical formulations in cosmetic research.

Dosages are reported from published protocols for reference only. Research chemicals are not for human consumption.

5 Research studies (8)

  1. GHK-Cu: A Potential Natural Modulator of Multiple Cellular Pathways in Skin Aging
    Biomolecules (2015) · Review · N/A (review)
    Comprehensive review. GHK-Cu modulates 4,000+ genes; promotes collagen, elastin, VEGF. Anti-inflammatory, antioxidant, and wound-healing properties documented.
    Key finding: GHK-Cu upregulates 41.2% of human genes while downregulating 58.8% — a broad genomic modulator favoring tissue repair over inflammation.
  2. Skin Remodeling by GHK Tripeptide: Collagen, Elastin, and Angiogenesis
    Archives of Dermatological Research (1985) · Preclinical · N=36 (cell cultures)
    Early foundational paper establishing GHK stimulation of collagen synthesis in fibroblast cultures.
    Key finding: GHK stimulated collagen synthesis 2.7-fold in human dermal fibroblast cultures at nanomolar concentrations.
  3. A Torilis japonica Extract-GHK-Cu Complex Attenuates Th2 Cytokines and Promotes Keratinocyte Recovery: A Potential Antioxidant Strategy for Atopic Dermatitis
    Antioxidants (Basel, Switzerland) (2026) · Preclinical
    PMCID: PMC13405852 PMID: 42510549 The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.
  4. Copper peptide activated cascade catalysis for glucose regulation and hypoxia reversing in infected diabetic wound healing
    Materials today. Bio (2026) · Preclinical
    Its multifunctional synergistic mechanism offers novel insights for addressing clinical challenges in refractory diabetic wound healing.
  5. Hierarchical regulation and mechanism of "open-hollow-fibrous network" structures: Osteogenic-angiogenic coupling responses of poly(γ-benzyl-L-glutamate) microspheres
    Biomaterials advances (2026) · Preclinical
    Overall, the PBLG-GCu HNMs integrated hierarchical structural biomimicry with dual osteogenic-angiogenic bioactivity, exhibiting great potential as injectable scaffolds for repairing irregular bone defects.
  6. Middle-aged mice treated with GHK-Cu peptide administered intraperitoneally or intranasally show behavioral rescue but divergent hippocampal aging programs
    Research square (2026) · Preclinical
    PMCID: PMC13232416 PMID: 42245779 The author(s) declare no competing interests.
  7. Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives
    International journal of molecular sciences (2026) · Meta-Analysis
    Although these are strategic and innovative options that can improve health, performance, and longevity, further studies are needed before most new peptides can be used safely in humans.
  8. The GHK-Cu delays aging in Caenorhabditis elegans via coordinated regulation of mitochondrial function and activation of DAF-16/SKN-1 pathways
    Biogerontology (2026) · Preclinical
    PMID: 42084774 [Indexed for MEDLINE] Conflict of interest: The authors declare no competing interests.

6 Safety and risk profile

6.1 Regulatory status

GHK-Cu is currently classified as Investigational. It has no approved human indication in the United States; availability elsewhere does not imply demonstrated safety or efficacy.

Safety score: 70/100 — low concern. Derived from clinical data volume, known risks and regulatory status.

6.2 Contraindications

Conditions and populations in which use is contraindicated:

  • Wilson disease (impaired copper metabolism)
  • Hemochromatosis or iron overload disorders
  • Known copper allergy
  • Concurrent high-dose zinc supplementation (competes with copper absorption)

6.3 Drug interactions

Drug or classInteractionRisk
High-dose zinc supplementsZinc competes with copper for absorption and transport — may reduce GHK-Cu efficacy.Moderate
Iron supplementsIron and copper metabolism are linked — high iron may alter copper homeostasis.Low

6.4 Long-term risks

  • Copper accumulation in liver/brain with chronic supranormal dosing
  • Alteration of copper/zinc ratio with long-term use
  • Potential for excessive fibrosis if tissue remodeling is unregulated

6.5 Research best practices

  • Store at −20 °C in dark (light-sensitive copper complex)
  • Monitor serum copper and ceruloplasmin in long-term protocols
  • Use separate syringe for GHK-Cu (copper can denature other peptides)
  • Topical application with microneedling enhances dermal penetration 5–10x
Safety data disclaimer. Safety assessments are based on published literature and are for educational reference only. Clinical evidence varies significantly between peptides. Always consult primary research and current regulatory guidance.

7 Frequently asked questions

How does GHK-Cu work differently from cosmetic skincare peptides?
Unlike superficial peptides that stay on the skin surface, GHK-Cu penetrates the dermis and systematically reprograms gene expression — upregulating collagen/elastin genes while downregulating inflammatory and tissue-destructive genes. It effectively "resets" skin cells to a younger transcriptional profile.
Why does copper matter in this peptide?
GHK naturally chelates copper (Cu²⁺) with extremely high affinity. Copper is an essential cofactor for collagen cross-linking enzymes (lysyl oxidase), superoxide dismutase (antioxidant defense), and angiogenesis — the peptide delivers copper precisely to where tissue remodeling is occurring.
What does the gene expression data mean?
GHK-Cu has been shown to modulate over 4,000 human genes — upregulating tissue repair, antioxidant, and anti-aging pathways while downregulating genes associated with inflammation, fibrosis, and cancer. This makes it one of the most genomically active peptides studied.

8 References

  1. A Torilis japonica Extract-GHK-Cu Complex Attenuates Th2 Cytokines and Promotes Keratinocyte Recovery: A Potential Antioxidant Strategy for Atopic Dermatitis PubMed (2026). Jeon S, et al.. View source
  2. Middle-aged mice treated with GHK-Cu peptide administered intraperitoneally or intranasally show behavioral rescue but divergent hippocampal aging programs PubMed (2026). Mazzola J, et al.. View source
  3. The GHK-Cu delays aging in Caenorhabditis elegans via coordinated regulation of mitochondrial function and activation of DAF-16/SKN-1 pathways PubMed (2026). Wen H, et al.. View source
  4. The Laccase-like Property of GHK-Cu and Its Applications in Colorimetric Sensing of Phenolic Compounds PubMed (2026). Chen JS, et al.. View source

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9 See also

For research reference only. Not medical advice. Peptides may be regulated or restricted in your jurisdiction. Entry validated by the PeptidePlaza Biomedical Research Desk; see editorial standards.

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