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 Glutathione film mask magic: feels like its melting in, works fast 1h,but you can leave use it overnight, great daily for dry skin. , If you want to try it , you can find it on Amazon or GHK Cu for Skin Rejuvenation WeCare Pharmacy 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