GHK-Cu (Copper Tripeptide-1 / Glycyl-L-histidyl-L-lysine-Cu2+)

In this laboratory experiment, the researchers investigated GHK-Cu, a small protein (peptide) that occurs naturally in the blood. They saw that the substance made connective tissue cells (fibroblasts) produce more collagen. The effect occurred even at very low concentrations and was not due to an increase in the number of cells. The researchers point out that GHK is present as a building block in collagen itself, and that it may be released in wounds and contribute to healing. This is a cell study, not a test in humans.

In this laboratory experiment, the researchers tested GHK-Cu together with hyaluronic acid on skin cells and on skin samples outside the body. Both substances are known to increase collagen. The combination increased production of several types of collagen (I, IV and VII), and they acted particularly strongly together on collagen IV. At one particular mixing ratio, collagen IV was sharply increased in the cell experiments and more moderately in the skin samples. The researchers believe the molecular size of the hyaluronic acid and the mixing ratio matter. This is laboratory work, not a study in humans.

This review summarises research on GHK and the copper complex GHK-Cu in relation to tissue renewal. The authors describe that in studies the substance is linked to many processes: it attracts repair cells, has anti-inflammatory and antioxidant effects, and is associated with increased production of collagen and elastin, among others. They refer to experiments in which GHK-Cu has been linked to wound healing, and to controlled skin studies in which firmer, more elastic skin and fewer fine lines were seen. The article compiles existing studies; it is not a new experiment.

In this animal study in rats, the researchers investigated GHK-Cu in wounds. Small chambers were placed under the rats' skin and received either saline or GHK-Cu. Where GHK-Cu was injected, the amount of tissue, protein, collagen and other connective tissue substances increased, and the increase was dose-dependent. Collagen increased the most. Another control peptide had no effect. The researchers conclude that GHK-Cu can increase the build-up of connective tissue in wounds in rats. This is an animal study, not a test in humans.

In this animal study, the researchers made small fat bubbles (liposomes) containing GHK-Cu and tested them on cells and on mice with burns. GHK-Cu in liposomes made the cells divide faster and increased signals linked to the formation of new blood vessels. In mice with scald injuries, the treatment gave better blood vessel formation than ordinary GHK-Cu, and the wounds healed in around 14 days. The researchers believe such liposomes may be worth investigating further for skin wounds. This is a laboratory and animal study, not a test in humans.

This review summarises research from 2016 to 2025 on small proteins (tripeptides) and wound healing. The authors describe that in studies such substances are linked to cells migrating and dividing, inflammation being dampened, new blood vessels forming and collagen being built up. GHK-based variants, including nanoparticles and gels, are mentioned as examples that in experiments have been associated with better wound closure. The article points to a need for more research on stability and absorption. This is a compilation of earlier studies, not a new experiment.

In this human study, 13 patients were treated with laser (CO2) on the skin around the mouth, and then followed a skincare routine with or without GHK-Cu. Blinded assessments and computer analysis found no definite difference between the groups in redness, wrinkles or skin quality. All patients improved, but with no demonstrated difference between the groups. The patients who used GHK-Cu were nevertheless themselves more satisfied with their skin quality. The study is small, and the results are mixed.

This review summarises research on GHK as a possible anti-ageing substance. The authors point out that the level of GHK in the blood falls with age. The substance binds copper to form GHK-Cu, and in laboratory and animal studies it has been described as anti-inflammatory and antioxidant, and associated with skin renewal and wound healing. They also mention early observations in mice suggesting an effect on memory and thinking. The authors believe the findings justify investigating the substance further in preclinical and clinical research. This is a compilation of earlier studies.

This review looks at whether GHK and GHK-Cu may be relevant in relation to ageing and brain health. The authors describe that oxidative stress, copper imbalance and inflammation are considered contributors to age-related diseases of the nervous system. GHK is known for binding copper and for antioxidant and anti-inflammatory properties in studies, and more recent research shows that it can affect the activity of many genes. On this basis, the authors propose GHK as a possible substance for further investigation. This is a theoretical compilation, not an experiment.

This review describes how the activity of certain genes changes with age, and how the blood peptide GHK, which declines with age, is linked in studies to many processes: wound healing, tissue renewal, more collagen, new blood vessels and antioxidant and anti-inflammatory effects. The authors particularly highlight research in which GHK appears able to shift gene activity in diseased cells from patients with cancer or COPD in a healthier direction. The article discusses different ways of using GHK. This is a compilation of earlier research, not a new experiment.

In this animal study, the researchers investigated GHK-Cu in mice with artificially induced bowel inflammation (ulcerative colitis), as well as in cells in the laboratory. GHK-Cu appeared to dampen weight loss, reduce inflammation and swelling in the bowel, increase the number of mucus-producing cells and promote healing of the bowel lining. The researchers linked the effect to specific signalling pathways in the cells (SIRT1 and STAT3). When they knocked out one of these signals, the effect disappeared. This is an animal and cell study, not a test in humans.