GHK CU Introducing GHK Cu Serum: Unlock the Secret to Youthful Skin! We are excited to announce the launch of our latest innovation from 8 Research Labs: the GHK Cu Serum! This cutting edge formula GHK Cu: The Peptide That Supports Healthy Aging GHK Cu (copper peptide) is naturally occurring in the body and plays a role in supporting skin health, collagen production, and tissue repair. As Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Innovation meets biology GHK Cu is a naturally occurring copper peptide studied for its role in skin health, collagen support, and tissue repairmaking it a powerful tool in next generation peptide science. Precision.