GHK-Cu Peptide: Hair Growth, Wound Healing, and Skin Research

GHK-Cu (glycyl-L-histidyl-L-lysine copper complex) is a naturally occurring tripeptide-copper complex first isolated from human plasma in the 1970s by Loren Pickart. Its concentration declines markedly with age — from ~200 ng/mL at age 20 to ~80 ng/mL by age 60 — prompting research interest in exogenous supplementation within wound care and regenerative medicine contexts.

Mechanisms of Action

GHK-Cu exerts effects through multiple pathways:

• Copper delivery: The copper ion is essential for lysyl oxidase activity (collagen and elastin crosslinking) and for superoxide dismutase (SOD) function (antioxidant defence).
• Growth factor upregulation: Stimulates expression of VEGF, FGF-2, and TGF-β, promoting angiogenesis and fibroblast proliferation in wound beds.
• Matrix metalloproteinase (MMP) modulation: Increases MMP-2 to clear damaged tissue while upregulating TIMP-1/2 to prevent excessive degradation.
• Hair follicle biology: Enlarges follicle size and prolongs anagen (growth) phase in murine models; proposed mechanisms include Wnt/β-catenin pathway activation and increased follicle stem cell activity.

Hair Growth Research

GHK-Cu has been evaluated in several studies as a potential androgenetic alopecia intervention:

• A randomised controlled trial comparing 2% minoxidil, 5% minoxidil, and 0.5 mM GHK-Cu solution found comparable hair density improvements at 6 months in the GHK-Cu arm versus 2% minoxidil.
• In vitro work on dermal papilla cells demonstrates GHK-Cu upregulates genes associated with proliferation and follicle maintenance (e.g., versican, β-catenin targets).
• Topical formulations in rodent models show increased follicle diameter and hair shaft diameter, particularly in hormonally induced alopecia models.

Researchers exploring GHK-Cu for hair biology may also wish to evaluate Myotrope's GHK-Cu 50 mg research vials, which are third-party purity verified.

Wound Healing and Skin Research

The wound-healing literature for GHK-Cu is more mature than its hair-growth literature:

• Multiple clinical studies in chronic wounds and post-surgical incisions report faster re-epithelialisation and reduced scarring with GHK-Cu containing dressings.
• Anti-inflammatory effects are well documented — reduction of IL-6, TNF-α, and IL-1β in treated wound models.
• Gene array studies (Pickart et al., 2012) identified GHK-Cu as influencing expression of over 4,000 human genes, including those governing DNA repair, antioxidant defence, and mitochondrial function.

Peptide Profile

Property	Value
Sequence	Gly-His-Lys (copper complex)
Molecular weight	340.38 g/mol (free peptide)
Common research concentrations	0.1–1 mM (topical); 1–10 mg/kg (systemic, animal)
Stability	Lyophilised form stable at −20 °C; reconstituted solutions should be used within 2–4 weeks

References

• Pickart L, Vasquez-Soltero JM, Margolina A. (2015). GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. BioMed Research International.
• Uno H, Kurata S. (1993). Chemical agents and peptides affect hair growth. Journal of Investigative Dermatology, 101(1 Suppl), 143S–147S.
• Finkley MB, et al. (2003). Evaluation of copper peptide GHK-Cu on hair follicle growth. Journal of the American Academy of Dermatology.