Experiencing itching & burning from your GHK CU peptide injections? Try these to hacks:, 1. Use a longer syringe to penetrate deeper into the fat cells. , 2. Dilute the copper. Here I show you how to GHK Cu (Copper Peptide) LeadWest Medical Most people think they need to take copper peptides. But Your body already produces its own copper peptide called GHK Cu. But levels naturally decline with age. So Instead of trying to replace Amazon.com: 99% GHK Cu Copper Peptide Powder CAS 49557 75 7 7g pack : Beauty & Personal Care