GHK-Cu Peptide

GHK-Cu is a naturally occurring complex consisting of the tripeptide GHK (glycine–histidine–lysine) bound to a copper ion. The copper component is thought to stabilize the peptide and facilitate delivery to cells. Research suggests GHK-Cu may play a role in tissue repair, wound healing, and immune support, potentially through stimulation of collagen, elastin, and glycosaminoglycan production—key components of the extracellular matrix.

Additionally, GHK-Cu is suggested to exhibit antioxidant and anti-inflammatory properties, which may help protect cells from free radical damage.

Chemical Makeup

• Molecular Formula: C14H23CuN6O4

• Molecular Weight: 340.38 g/mol

• Other Names: Cu-GHK, Copper Tripeptide-1

Research and Clinical Studies

GHK-Cu and Collagen Synthesis

Studies suggest GHK-Cu may stimulate collagen production and support tissue regeneration. This may be linked to the Gly-His-Lys sequence, which can form during collagen breakdown and influence fibroblasts—cells responsible for producing new collagen.

Research indicates:

• Increased type I collagen production

• Enhanced skin thickness, elasticity, and hydration

• Improved keratinocyte proliferation and reduced inflammation(2)

Further studies suggest potential synergy with hyaluronic acid (HA). Specific ratios (e.g., 1:9 with low molecular weight HA) appeared to significantly increase collagen IV synthesis, possibly due to combined effects on collagen production and reduced degradation.(3)

GHK-Cu and Wound Infection

Animal and clinical studies suggest GHK-Cu may reduce inflammation and infection risk in wounds.

• Reduced levels of inflammatory markers (TNF-alpha, MMP-2, MMP-9) in murine models(4)

• Lower infection rates in diabetic ulcer models (7% vs. 34% in controls)(5)

These findings suggest a role in limiting inflammation and tissue breakdown.

GHK-Cu and Wound Healing

Studies indicate GHK-Cu may accelerate wound healing and tissue repair:

• Faster healing time and increased granulation tissue formation

• Enhanced neovascularization (blood vessel formation)

• Reduced wound size compared to controls(4)(6)

Clinical findings suggest wound closure rates may be up to three times faster when combined with standard care.(5)

Additional studies using GHK-infused dressings showed near-complete wound closure (~99%) compared to controls (~69%). These effects were associated with:

• Increased antioxidant levels (glutathione, ascorbic acid)

• Enhanced fibroblast activity

• Improved epithelialization and mast cell response(7)

GHK-Cu and Active Radicals

Photodamage of tissues such as the skin involves the formation of reactive oxygen species (ROS), reactive nitrogen species (RNS), and reactive carbonyl species (RCS), which may induce damage to proteins, DNA, and lipids. Studies suggest that the amino acid sequence in GHK-Cu may have anti-RCS potential against radicals such as 4-hydroxynoneal, acrolein, malondialdehyde, and others.⁽⁸⁾ Furthermore, it may potentially prevent protein glycation. Moreover, researchers have suggested that GHK-Cu may have potential action in reducing iron release from ferritin. Ferritin is a lipid peroxidation catalyst, and GHK-Cu may help to reduce the formation of iron complexes in damaged tissues and thus decrease inflammation. One study suggested an 87% decrease in iron release with the help of GHK-Cu to lower oxidation in damaged tissues.⁽⁹⁾

GHK-Cu may also reduce the production of reactive oxygen species and inflammatory cytokines while increasing the activity of antioxidant enzymes. This was proposed by an animal study investigating the potential of GHK-Cu on lipopolysaccharide-induced lung inflammation in mice.⁽¹⁰⁾ The peptide was suggested to suppress the activation of NF-κB and p38 MAPK signaling pathways associated with inflammation. This might potentially lead to reduced infiltration of inflammatory cells in the lungs of mice with lung damage and lower levels of TNF-1 and IL-6 production to minimize damage.

Further studies also suggest that the amino-acid sequence of GHK-Cu may have an antioxidative potential on ROS, such as hydroxyl radicals, and it may be even stronger than generic antioxidative peptides.⁽¹²⁾

GHK-Cu and Wrinkles in Skin Tissue Models

GHK-Cu has been suggested to host potential for improving experimental models of disturbed skin topography, such as wrinkles and fine lines. One study posited that a GHK-Cu possibly reduces visible bioindicators, improving skin laxity, and clarity. The peptide apparently also reduced the depth of wrinkles while potentially increasing skin density and thickness after 12 weeks of experimentation in skin cell models with varying degrees of photodamage.⁽¹³⁾

Another investigation focused on the actions of GHK-Cu compared to a control compound and vitamin K. Over a period of 12 weeks, the GHK-Cu ostensibly performed better than the controls in reducing epidermal wrinkles. The peptide may also have increased skin density and thickness.⁽¹⁴⁾

In a separate 12-week study in mild to advanced photodamage, GHK-Cu seemingly improved skin attributes such as laxity, clarity, and firmness. This peptide was also associated with a reduction in coarse wrinkles, and mottled pigmentation. Additionally, the peptide apparently stimulated dermal keratinocyte proliferation, as evidenced by histological analysis of biopsies.⁽¹⁵⁾

GHK-Cu peptide is available for research and laboratory purposes only.