Both are associated with pigmentation
They are sometimes discussed in research or aesthetic contexts, but their real-world use carries known risks and unknown long-term effects
[CrossRef] [PubMed] [Google Scholar] Copper peptides in acne scars
Published scientific literature discusses GHK-Cu in relation to copper peptide research, peptide chemistry, gene expression studies, molecular biology, receptor biology, cellular communication, and analytical peptide characterization
During the dosage-escalation phase, nine patients were administered doses of 400, 800, or 1600 g mRNA without encountering dose-limiting toxicities, Hence designating 1600 g as the recommended phase II dose (RP2D)
Ghuran 2011)