GHK-Cu (Glycyl-L-Histidyl-L-Lysine Copper) is a naturally occurring copper-binding tripeptide found in human plasma, saliva and urine. GHK has a strong affinity for copper ions, forming the biologically active GHK-Cu complex.

GHK-Cu has attracted considerable research and cosmetic interest because of its potential involvement in skin regeneration, collagen production, wound repair, tissue remodelling, hair-follicle biology and inflammatory signalling.

Key Research Areas

Skin Repair & Regeneration
GHK-Cu is particularly well known for skin-related research. Experimental studies suggest it can influence fibroblasts, keratinocytes and other cells involved in repairing and maintaining skin tissue.

Collagen & Elastin
One of the most extensively investigated properties of GHK-Cu is its relationship with the extracellular matrix. Research has demonstrated stimulation of collagen synthesis, while broader studies have investigated effects involving elastin, glycosaminoglycans and proteoglycans.

Wound-Healing Research
GHK-Cu has been investigated in numerous experimental wound models. Animal research has demonstrated increased collagen and glycosaminoglycan accumulation, fibroblast activity and other processes involved in wound repair.

Skin Ageing & Cosmetic Research
Copper peptides have become widely used in cosmetic skincare products. Research has examined GHK-Cu in relation to skin firmness, elasticity, fine lines, photodamage and overall skin remodelling. However, a recent review notes that despite widespread cosmetic use, robust clinical evidence specifically evaluating topical GHK-Cu remains relatively limited.

Angiogenesis & Tissue Remodelling
GHK-Cu has been investigated for its influence on angiogenesis, the process through which new blood vessels develop. This activity may be relevant to its broader role in tissue repair and regeneration.

Hair & Follicle Research
GHK-Cu has also generated interest in hair research. Studies and reviews have investigated its effects on hair-follicle size, cellular proliferation and tissue surrounding the follicle, although evidence for treating human hair loss is considerably less established than its popularity online might suggest.

Inflammatory & Antioxidant Pathways
Research suggests GHK-Cu can influence several inflammatory and oxidative-stress pathways. These effects are being investigated as part of its broader tissue-protective and regenerative activity.

How GHK-Cu Is Being Studied

GHK consists of three amino acids:

Glycine – Histidine – Lysine

When GHK binds a copper (Cu²⁺) ion, it forms GHK-Cu. Copper is an important cofactor for numerous enzymes involved in connective-tissue formation, cellular respiration and antioxidant defence.

Research surrounding GHK-Cu has focused on:

• Collagen and extracellular-matrix synthesis
• Fibroblast and keratinocyte activity
• Skin and tissue remodelling
• Angiogenesis
• Wound-repair pathways
• Inflammatory signalling
• Antioxidant activity
• Hair-follicle biology
• Gene-expression pathways

GHK-Cu therefore differs from many other research peptides because its activity is closely associated with its ability to bind and transport copper.

GHK-Cu & Skin Research

GHK-Cu is especially prominent in dermatology and cosmetic research. Studies have investigated its potential to support collagen and extracellular-matrix production while influencing cellular processes involved in maintaining healthy skin.

This is also why copper peptides are commonly incorporated into serums, creams and other topical cosmetic formulations.