The Peptide Craze Ground Truths GHK Cu Hair Growth What is GHK Cu and Why is Everyone Talking About It? GHK Cu (Copper Peptide) is a powerful, naturally occurring compound in the body that plays a key role in skin health GHK Cu Copper Peptide: The Ultimate Peptide For Longevity GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference