Research
GHK-Cu, also known as copper tripeptide-1, is a naturally occurring copper-binding peptide made from the amino acids glycine, histidine, and lysine. It has been studied mainly for skin repair, collagen support, wound-healing pathways, tissue remodelling, antioxidant activity, and anti-inflammatory effects. Most published human research has focused on topical GHK-Cu, while injectable use remains less formally studied.
GHK-Cu is currently being researched and is not registered as an approved treatment, but early studies and review literature have shown promising potential in skin and tissue-repair research.
1. Skin repair and anti-aging research — collagen, elasticity, and skin density
A review published on PubMed Central summarised several studies on GHK-Cu and skin ageing. It reported that GHK-Cu has been associated with improved skin appearance, elasticity, firmness, and collagen-related markers. The review also notes that a GHK-Cu facial cream was studied over 12 weeks in women with photoaged skin, where improvements were reported in skin laxity, clarity, fine lines, wrinkle depth, skin density, and thickness.
Original review article:
https://pmc.ncbi.nlm.nih.gov/articles/PMC4508379/
Additional review article:
https://pmc.ncbi.nlm.nih.gov/articles/PMC6073405/
2. Diabetic wound-healing study — topical GHK-Cu and ulcer repair
A multicentre, randomised, evaluator-blinded, placebo-controlled clinical study looked at glycyl-L-histidyl-L-lysine copper, also known as GHK-Cu, in people with diabetic neuropathic ulcers. The study was published in Wound Repair and Regeneration and evaluated topical GHK-Cu gel as part of wound-care research. This is one of the more commonly cited human wound-healing studies involving GHK-Cu.
Original PubMed article:
https://pubmed.ncbi.nlm.nih.gov/17147644/
Original DOI / publisher link:
https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1524-475X.1994.20406.x
3. Tissue remodelling and extracellular matrix research
GHK-Cu has been studied for its effects on the extracellular matrix, which is the structural support network around cells. Research has linked GHK-Cu with stimulation of collagen, elastin, glycosaminoglycans, dermatan sulphate, and chondroitin sulphate, all of which are involved in skin structure, firmness, hydration, and tissue repair. This is one of the main reasons GHK-Cu is frequently discussed in regenerative skin and wound-healing research.
Original PubMed article:
https://pubmed.ncbi.nlm.nih.gov/18644225/
Full review article:
https://pmc.ncbi.nlm.nih.gov/articles/PMC4508379/
4. Oxidative stress and protective research
A review published in Oxidative Medicine and Cellular Longevity discussed GHK-Cu in relation to oxidative stress, tissue protection, wound healing, and anti-aging skin-care research. The paper describes GHK-Cu as a naturally occurring human peptide with a long history of use in skin-care and wound-healing research, and highlights its potential antioxidant and tissue-protective actions.
Original PubMed article:
https://pubmed.ncbi.nlm.nih.gov/22666519/
Full article:
https://pmc.ncbi.nlm.nih.gov/articles/PMC6073405/
5. Anti-inflammatory and regenerative potential
A 2020 review titled “The potential of GHK as an anti-aging peptide” summarised research suggesting that GHK-Cu may support skin remodelling, wound healing, regeneration, and antioxidant/anti-inflammatory pathways. The authors describe GHK-Cu as a peptide of interest for further anti-aging and tissue-repair research, while also making clear that more high-quality studies are needed.
Original PubMed article:
https://pubmed.ncbi.nlm.nih.gov/35083444/
Full article:
https://pmc.ncbi.nlm.nih.gov/articles/PMC8789089/
6. Wound biology and glycosaminoglycan research
A study published in the Journal of Investigative Dermatology examined how the tripeptide-copper complex GHK-Cu may modulate glycosaminoglycans and small proteoglycans in wound environments. These molecules are important because they help regulate tissue structure, hydration, and repair signalling during wound healing.
Original article:
https://www.sciencedirect.com/science/article/pii/S0022202X1541067X
Journal page:
https://www.jidonline.org/article/S0022-202X%2815%2940514-7/fulltext
Quick Research Summary
Current research suggests that GHK-Cu may have promising potential in skin repair, collagen support, extracellular matrix remodelling, wound-healing pathways, and anti-inflammatory research. The strongest human evidence is mainly from topical skin and wound-healing studies, while injectable use is far less established in formal clinical research.