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 GHK Cu Peptide Dosing PeptidesPower GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B How to cycle ghk cu? : r PeptideGuidesPH