GHK Cu Peptide: Benefits for Tissue Repair, Healing, and Recovery Revolution Health & Wellness GHK Cu Peptide Serum 30 ml, Copper Peptide Serum with Hyaluronic Acid for Tightening, Collagen Boosting GHK Cu is a copper peptide used in regenerative medicine to support collagen production, tissue repair, and cellular renewal throughout the body. It's for individuals looking to improve skin firmness, brightness, and visible 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 GHK CU Beverly Hills Rejuvenation Center