GHK-Cu

preclinical

Also known as: Copper peptide, Copper tripeptide-1

GHK-Cu (copper tripeptide-1) is a naturally occurring copper-binding tripeptide (glycyl-histidyl-lysine) that exerts its effects primarily through modulation of gene expression and extracellular matrix remodeling. Its mechanism involves chelating copper ions, which facilitates activation of matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs), thereby promoting balanced collagen turnover. GHK-Cu also upregulates genes associated with collagen synthesis (e.g., COL1A1, COL3A1), angiogenesis, and antioxidant defense, while downregulating pro-inflammatory cytokines. These actions collectively enhance wound healing, dermal regeneration, and tissue repair. Preclinical research (72 PubMed-indexed studies) demonstrates that GHK-Cu accelerates wound closure in animal models by increasing fibroblast proliferation, neovascularization, and re-epithelialization. In vitro, it stimulates synthesis of collagen I, III, and glycosaminoglycans, and reduces UV-induced DNA damage. Studies also show neuroprotective and anti-inflammatory properties, with potential applications in skin aging, hair growth, and bone repair. However, no human clinical trials have been published to date, limiting translational evidence. Clinically, GHK-Cu is widely used in topical cosmetic formulations for anti-aging and wound healing, though regulatory approval for therapeutic indications remains preclinical. Its safety profile appears favorable in animal studies, but efficacy claims lack robust human data. For research purposes only — not medical advice.

Key data

Category
Healing & Recovery
Molecular weight
400.9 g/mol
Molecular formula
C14H21CuN6O4-
Administration
topical, subcutaneous
Research status
preclinical
References
80
Tags
copper, collagen, wound-healing, skin

Research & studies

Peptide Supplements and Their Therapeutic Applications in Sports Medicine
The American journal of sports medicine · 2026 · PubMed

67% of identified publications used preclinical animal models, mostly rats, showing variable effects on tendon, muscle, bone, and ligament healing.; Human clinical studies were few, lacked robust controls, and showed at best modest improvements for metabolic bone health and degenerative knee pain.; Some peptides, such as MK-677, were associated with significant risks including congestive heart failure and metabolic dysfunction like insulin resistance.; Due to lack of robust efficacy and safety data, peptide supplements are not currently recommended for musculoskeletal recovery or performance enhancement.

Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives
International journal of molecular sciences · 2026 · PubMed

Therapeutic peptides are effective for type 2 diabetes and obesity treatment.; Peptides show potential for skin rejuvenation and as hormone analogs.; Novel unapproved peptides are expanding into preventive medicine and performance enhancement.; More research is required to ensure safe human use of most new peptides.

Injectable Peptide Therapy: A Primer for Orthopaedic and Sports Medicine Physicians
The American journal of sports medicine · 2026 · PubMed

BPC-157 showed potential in tendon and muscle repair but lacks validation in human trials.; TB-4 and TB-500 promoted angiogenesis in preclinical models, but human orthopaedic data are absent.; CJC-1295 with ipamorelin improved muscle tension in murine models, limited to animal studies.; No clinical evidence supports GHK-Cu or tesamorelin for musculoskeletal conditions.

An injectable hydroxyapatite microsphere filler loaded with GHK-Cu tripeptide for anti-Inflammatory and antioxidant
Colloids and surfaces. B, Biointerfaces · 2025 · PubMed

GHK-Cu was successfully loaded onto hydroxyapatite microspheres by electrostatic adsorption.; GHK-Cu@CMHA gel exhibited sustained release of GHK-Cu for 7 days with good flowability and injectability.; In LPS-induced inflammation models, GHK-Cu@CMHA reduced inflammatory factors and ROS levels while increasing SOD activity.; H&E and Masson staining showed significant collagen deposition, confirming anti-inflammatory and antioxidant properties.

Exploring the beneficial effects of GHK-Cu on an experimental model of colitis and the underlying mechanisms
Frontiers in pharmacology · 2025 · PubMed

GHK-Cu reduced weight loss, DAI, colonic edema, and inflammatory damage in DSS-induced UC mice.; GHK-Cu upregulated ZO-1 and Occludin expression, promoting mucosal healing in a co-culture model.; GHK-Cu increased SIRT1 and decreased p-STAT3 expression; STAT3 silencing abolished its effects on healing and tight junction proteins.; GHK-Cu suppressed inflammatory cytokines and RORγt expression, indicating potential Th17 cell reduction.

Copper Complexes with New Glycyl-l-histidyl-l-lysine-Hyaluronan Conjugates Show Antioxidant Properties and Osteogenic and Angiogenic Synergistic Effects
Bioconjugate chemistry · 2025 · PubMed

GHK-HA conjugates bind copper(II) ions and potentiate the properties of HA and GHK in vitro.; Copper promotes expression and release of BDNF, VEGF, and BMP-2.; Protective and regenerative activities involve translocation of CCS and Atox1 to the nucleus as transcription factors.

Are We Ready to Measure Skin Permeation of Modern Antiaging GHK-Cu Tripeptide Encapsulated in Liposomes?
Molecules (Basel, Switzerland) · 2025 · PubMed

GHK-Cu is a hydrophilic compound with limited permeation through the lipophilic stratum corneum.; Liposomes may improve GHK-Cu's skin permeation potential.; Literature shows little attention to transport of liposomes containing GHK-Cu.; This research gap drives need for new methods to evaluate liposome effects on GHK-Cu transportation.

The glycyl-l-histidyl-l-lysine-Cu(2+) tripeptide complex attenuates lung inflammation and fibrosis in silicosis by targeting peroxiredoxin 6
Redox biology · 2024 · PubMed

GHK-Cu binds to peroxiredoxin 6 (PRDX6) to reduce lung inflammation and fibrosis in silicosis mice.; GHK-Cu inhibits crystalline silica-induced oxidative stress in alveolar macrophages.; No significant systemic toxicity was observed with GHK-Cu treatment.; GHK-Cu attenuates progression of pulmonary inflammation and fibrosis in silicosis.

Frequently asked questions

What is GHK-Cu?

GHK-Cu (copper tripeptide-1) is a naturally occurring copper-binding tripeptide (glycyl-histidyl-lysine) that exerts its effects primarily through modulation of gene expression and extracellular matrix remodeling. Its mechanism involves chelating copper ions, which facilitates activation of matrix metalloproteinases (M

How does GHK-Cu work?

Copper-binding tripeptide that stimulates collagen synthesis, wound healing, and remodeling gene expression.

What is the research status of GHK-Cu?

GHK-Cu is currently classified as preclinical, with 80 research references on record. This is for research purposes only and is not medical advice.

What is the molecular weight of GHK-Cu?

GHK-Cu has a molecular weight of approximately 400.9 g/mol (formula C14H21CuN6O4-).

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