Copper Overload and Depression in Women: A Critical Analysis GHK Cu is getting a lot of attention right now, and for good reason. This is not just a skin peptide. It's a copper binding tripeptide with documented effects on gene expression, collagen synthesis, CopperInduced Supramolecular Peptide Assemblies for MultiPathway Cell Death and Tumor Inhibition Zhang 2024 Angewandte Chemie International Edition Wiley Online Library Frontiers Copper toxicity and deficiency: the vicious cycle at the core of protein aggregation in ALS