Journal of Investigative Dermatology, 1999 PubMed The tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+ stimulates matrix metalloproteinase-2 expression by fibroblast cultures Simon A, Emonard H, Hornebeck W, Maquart FX Life Sciences, 2000 PubMed Expression of glycosaminoglycans and small proteoglycans in wounds: modulation by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+ Simon A, Wegrowski Y, Bontemps Y, Maquart FX Journal of Investigative Dermatology, 2000 PubMed These papers establish GHK-Cu's documented effect on matrix metalloproteinase activity and extracellular matrix components in wound-healing models
However many of these have off-target toxicity, low specificity, or are in early stages
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However, for the best results, it is always recommended to use supplements within their designated shelf life
Differential diagnoses to consider Septic arthritis should be considered in patients with monoarticular joint pain, with erythema, warmth and joint immobility