Amazon.com: GHK Cu Copper Peptide Supplement, Anti Aging & Hair Growth Support, Improves Skin Elasticity & Firmness, Thicker, Fuller Hair, Easy Absorption, Precisely Dosed, 90 Vegan Capsules : Health & Household 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 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 1% GHK CU solution: is this applied directly on skin or diluted further? : r DIYaesthetics