GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Do you know what this little blue injection is? It's called GHK Cu aka the Glow Peptide I've always believed in peptides for skincare, but honestly I never thought about GHK Cu Copper Peptides vs. Other Peptides in Skincare Vitali Skincare GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? How much GHK Cu should I inject daily?