Ever heard of the "Copper Uglies"? It sounds scary, but it's actually a sign of over enthusiasm! Copper peptides are incredible for skin remodeling, but they work on a "break down and Officially started my "copper uglies" phase of GHK CU, phase is NOT for the weak. No pin pain, but my skin is purging and I hate it What Is GHK Cu Peptide? What Is GHK Cu Peptide? GHK Cu (copper peptide) used topically is one of the most well studied skin repair peptides. Here's how it helps the skin, in practical terms: 1. Boosts collagen & elastin GHK Cu signals your skin