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 GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu Dosage Chart and Calculator: How to Use This Peptide Safely Peptides Unleashed