Product Question] The Ordinary is launching a new Growth Factor serum in January, thoughts? : r SkincareAddiction GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Let's take a short break from K beauty and revisit an OG skincare ingredient that has decades of research behind it: Copper peptides. One serum that highlights this ingredient beautifully is the @deciem Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3 Dr. Brenner Labs MediCube Hyaluronic Multi Peptide Serum (Ingredients Explained)