Injectable GHK Cu: Beginner's Guide to Copper Peptide GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B 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 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing., Alright, I need to give you an updateit's been 12 weeks since I started using GHK peptides from Transcend, and 7% GHK Cu Accelerant GHK CU Lumin Peptides