What GHK-Cu adds to the formulation: Gene expression modulation across hundreds of genes including collagen genes (Type I, III), tissue inhibitors of metalloproteinases, anti-inflammatory mediators Collagen synthesis stimulation, specifically Type I and Type III collagen the structural proteins of skin, connective tissue, and many other tissues Anti-inflammatory signaling through investigated effects on TNF-, IL-6, and NF-B pathways Copper-peptide chemistry effects including cofactor activity for skin-relevant enzymes Skin-research and hair-research applications (the GHK-Cu literature in these areas is substantial) For the GHK-Cu deep-dive, see Copper Peptides Explained
This is what makes it such a compelling part of a modern skincare strategy
The lack of sexual desire reflected in those results can be a significant issue for women, and the treatment can be complicated
While no mechanism suggests delayed toxicity, this cannot be completely ruled out without long-term controlled studies
These mechanisms are part of why the peptides have attracted attention
