GHK-Cu (glycyl-L-histidyl-L-lysine copper complex) is one of the longest-studied peptide compounds in biological research, with a published literature spanning more than five decades. First isolated from human plasma albumin in 1973 by Loren Pickart, GHK has since been found in multiple biological fluids and tissues — with circulating plasma levels declining measurably with age.
Pickart’s 1973 discovery originated from observations that young human plasma promoted liver cell growth in culture more effectively than old human plasma — a difference Pickart traced to a small copper-binding peptide. Published studies have documented an age-related decline in plasma GHK-Cu levels — from approximately 200 ng/mL in young adults to less than 80 ng/mL in individuals over age 60.
The most extensively studied biological activity of GHK-Cu is its stimulatory effect on collagen synthesis. Multiple published studies have demonstrated GHK-Cu’s ability to upregulate collagen gene expression in human fibroblast cultures, with Pickart and colleagues reporting increased type I, III, and IV collagen production beginning in the 1980s. Published clinical research has examined GHK-Cu-containing formulations in facial skin studies, reporting improvements in skin laxity and collagen density measurements compared to placebo.
GHK-Cu has a substantial published literature in wound healing biology, studied both topically and systemically in animal models. Published findings include accelerated re-epithelialization, increased angiogenesis, improved wound tensile strength, and reduced scarring across multiple published wound healing models.
Studies have reported GHK-Cu’s ability to modulate NF-κB activation and reduce production of pro-inflammatory cytokines including TNF-α and IL-1β in cell culture models. GHK-Cu has also been studied for antioxidant properties, including chelation of free copper ions and upregulation of antioxidant enzymes including superoxide dismutase and catalase.
A bioinformatics analysis published by Pickart and Margolina (2018) in Biomedicines proposed that GHK-Cu influences the expression of over 4,000 human genes — a finding the authors discussed in the context of GHK-Cu’s potential role as a biological signal in tissue damage and repair contexts.
For informational purposes only. GHK-Cu is available as a standalone compound and as a component of the GLOW and KLOW Blends at BravaLongevity.com. Not medical advice or dosing guidance.
