Your GHK Cu Cheat Sheet. Thinking about making the switch to Copper Peptides but have a few lingering questions? We've got you. The #superPeptide isn't just another serum it's a biological Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix Copper Peptide (GHK Cu) Serum MELAO Ghk Cu Copper Peptide Serum Anti Aging Face & Neck GHK Cu Copper Peptide Neck & Face Serum 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