GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B I've been getting a lot of questions about GHK Cu, so here's a quick breakdown. GHK Cu is a copper peptide that naturally occurs in the body and plays a role in skin repair Is this an accurate dosage for GHK CU : r Peptidesource GHK Cu Copper Peptide 0.5% (topical foam) GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B