What are the Best Peptides For Hair Growth? Serums, Creams GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3 Dr. Brenner Labs Ghkcu Peptide Serum Etsy 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 We're often asked what the difference is between our two Buffet serums. Do they target different concerns? Is one for more mature skin? Is one better suited to dry skin? As we're