Peptides are surging in popularity. There's little evidence that they work. A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Have you used peptides? What are your thoughts? Let me know below Peptides are short chains of amino acids that play vital roles in cellular signaling and repair throughout the body. Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 GHK Cu Revival Clinic