GHK cu is a copper peptide. It's great for skin, especially when you combine it with other things. My favorite is DMSO and derma rolling. My first experience with copper peptides was Procytes GHK Cu Uncovered A Comprehensive Guide to Anti Aging, Wound Healing, and Biohacking Protocols: Unleashing Peptide Science for Collagen Regeneration and Athletic Recovery (Peptide & SARMs Guides): Pierce, Gavin: 9798280350304: Amazon.com: Books Can Dmso and Ghk Be Mixed TikTok GHK CU 100MG MOB Biotech GHK Cu LVLUP Health DUO Hair Growth Serum and Scalp Rejuvenation