GHK-Cu is a naturally occurring human tripeptide-copper complex first isolated from plasma. Below is a curated selection of peer-reviewed studies investigating its properties.
2025
Exploring the Beneficial Effects of GHK-Cu on Experimental Ulcerative Colitis
Frontiers in Pharmacology (Open Access)
This 2025 study evaluated GHK-Cu in a DSS-induced mouse model of ulcerative colitis, finding it significantly reduced inflammatory cytokines (TNF-Ξ±, IL-6, IL-1Ξ²), alleviated colonic damage, and promoted mucosal healing. The authors identified SIRT1 as a likely direct binding target, with GHK-Cu shown to regulate the SIRT1/STAT3 signalling pathway.
View Paper β2023
Neuroprotective Effects of GHK Peptide in Alzheimer’s Disease Models
PubMed / bioRxiv
This study investigated intranasal delivery of GHK in 5xFAD transgenic mice, a model of early-onset Alzheimer’s disease. Over 12 weeks, GHK-treated mice demonstrated improved memory performance, reduced amyloid plaque burden, and decreased neuroinflammatory activity compared to controls, positioning GHK-Cu as a candidate for further preclinical evaluation in neurodegenerative research.
View Paper β2020
The Potential of GHK as an Anti-Aging Peptide
Aging and Disease (PMC / NIH)
GHK is naturally present in human serum but declines significantly with age β from approximately 200 ng/ml at age 20 to approximately 80 ng/ml by age 60. This review synthesises evidence for GHK-Cu’s anti-inflammatory and tissue remodelling properties, including promotion of skin regeneration, wound healing, and antioxidant activity.
View Paper β2018
Regenerative and Protective Actions of the GHK-Cu Peptide
International Journal of Molecular Sciences (PMC / Open Access)
This comprehensive review details GHK-Cu’s ability to stimulate blood vessel and nerve outgrowth, increase collagen and elastin synthesis, and exert potent anti-inflammatory effects by blocking NF-ΞΊB and p38 MAPK signalling pathways. The authors describe GHK-Cu as a broad-spectrum regenerative agent with applications in wound healing, tissue remodelling, and lung injury protection.
View Paper β2015
GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration
BioMed Research International (PMC / Open Access)
This paper examines GHK-Cu’s role in upregulating genes involved in collagen and glycosaminoglycan synthesis while simultaneously downregulating inflammatory and fibrotic pathways. It identifies GHK-Cu as a regulator of over 4,000 human genes, including those governing skin repair, extracellular matrix remodelling, and stem cell proliferation.
View Paper β2012
The Human Tripeptide GHK-Cu in Prevention of Oxidative Stress and Neurodegeneration
Oxidative Medicine and Cellular Longevity (Wiley / Open Access)
This paper proposes GHK-Cu as a therapeutic candidate against age-associated neurodegeneration and cognitive decline. It reviews GHK-Cu’s antioxidant and anti-inflammatory properties, its ability to restore copper homeostasis in the brain, and its capacity to regulate gene expression critical to neuronal development and maintenance.
View Paper β