GHK Cu Peptides Serum TryDeloura GHK Cu Copper Peptide Serum Clinical Anti Aging Skin Repair Beverly Hills Luxury Skincare 30ml 120 ml 4 oz Not all copper peptide serums are formulated the same Before you buy one, make sure you're actually getting pure GHK Cu at the right concentration not just a diluted blend. We spent PeptideLabz Copper Peptide 10% GHK CU 5% AHK CU Peptides Hair Growth Treatment Serum, Blue Price GHK CU Copper Peptide, Face Serum, 1 oz (30 ml)