In the complex space of modern cosmetic science, few topical ingredients have retained enduring clinical interest quite like copper peptides. Frequently marketed as a gentle alternative to traditional retinoids, copper tripeptide-1 (specifically GHK-Cu) occupies a unique position in aesthetic dermatology. Rather than relying on controlled irritation to force cellular turnover, copper peptides act as bioactive signal molecules, supporting the skin's natural repair pathways, i