GHK-CU is one of the most extensively researched peptides in regenerative science. Unlike many compounds that have only recently entered the research spotlight, GHK-CU has been studied for over five decades — making it one of the most well-documented peptides available to the research community today.
This post provides an educational overview of GHK-CU, its molecular structure, and the key areas in which it has been studied. All information is presented strictly for research and educational purposes.
What Is GHK-CU?
GHK-CU is a naturally occurring copper complex of the tripeptide glycyl-L-histidyl-L-lysine. The tripeptide has a strong affinity for copper and was first isolated from human plasma. It can also be found in saliva and urine. Wikipedia
In plasma, the level of GHK is about 200 ng/mL at age 20, but declines to 80 ng/mL by age 60. This decline in GHK level coincides with a noticeable decrease in regenerative capacity. PubMed Central This age-related decline has made GHK-CU a particularly interesting subject for longevity and regenerative researchers.
Mechanism of Action
The human peptide GHK has multiple biological actions. It stimulates blood vessel and nerve outgrowth, increases collagen, elastin, and glycosaminoglycan synthesis, and supports the function of dermal fibroblasts. GHK's ability to improve tissue repair has been demonstrated for skin, lung connective tissue, boney tissue, liver, and stomach lining. PubMed Central
Since 2010, research has revealed an additional mechanism — GHK-CU appears to modulate the expression of a large number of human genes, with the Broad Institute of MIT and Harvard identifying its effects on transcriptional responses across multiple biological pathways.
Skin and Tissue Research
GHK-CU has been the subject of significant dermatological research. GHK-CU applied to thigh skin for 12 weeks improved collagen production in 70% of the women treated, compared to 50% treated with vitamin C cream and 40% treated with retinoic acid. In addition to improving skin laxity, clarity, firmness and appearance, reducing fine lines, coarse wrinkles and mottled pigmentation, it also strongly stimulated dermal keratinocyte proliferation. PubMed Central
Wound Healing Research
In the dermal wounds of rabbits, GHK-CU facilitated wound healing, causing better wound contraction, faster development of granular tissue, and improved angiogenesis. It also elevated the level of antioxidant enzymes. Wikipedia
Research into GHK-CU modified nanoparticle formulations demonstrated more than 95% wound closure after 11 days of treatment, promoting epidermis thickness, re-epithelialization, and angiogenesis. ScienceDirect
Anti-Inflammatory Properties
GHK-CU exhibits known anti-inflammatory properties. A 2025 study published in Frontiers in Pharmacology investigated GHK-CU's therapeutic potential in inflammatory bowel research models, finding that it directly interacts with SIRT1 — a protein closely associated with cellular metabolism and stress responses. Frontiers
Hair Follicle Research
GHK-CU may stimulate hair growth through multiple mechanisms. It activates fibroblasts and promotes new blood vessel formation, ensuring hair follicles receive adequate nutrients. Salhabpharmacy Research has also shown increased anagen to telogen hair ratios in studies examining copper peptide effects on follicle activity.
Safety Profile
GHK-CU has a long history of safe use in research and wound care applications. It is naturally occurring, non-toxic, and effective at very low concentrations. Research consistently describes it as safe and well-tolerated. Salhabpharmacy
Research Availability
BioSupply UK supplies GHK-CU as a research grade compound at 99%+ purity, independently third party lab tested and HPLC verified. Available in 50mg and 100mg vials with Certificates of Analysis available on request. Strictly for laboratory and in-vitro scientific research only.
This content is intended for informational and research purposes only and does not constitute medical advice.