The detailed mechanism of cellular copper delivery from GHK-Cu whether the complex is taken up intact, whether copper is transferred at the cell surface, and how the copper is subsequently routed within the cell has been characterized in some detail in the published research but is not fully resolved at the level of all intermediate steps
Nelson DB, Tam AL, Mitchell KG, Rice DC , Mehran RJ, Sepesi B, Antonoff MB, Vaporciyan AA, Hofstetter WL
Lead, mainly, can increase the risk of reaching terminal stages, although more studies are needed to evaluate this causality
Posttranslational regulation of Akt in human cancer
However, not all triple GLP-1/GIP/GCG agonists are advancing to late-stage clinical trials
Hyman, Phelps & McNamara, FDA Law Blog, analysis of the 2026 peptide compounding actions