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 Topical Spray Wells Pharmacy Network PDF] Copper Peptides in Acne Scars Semantic Scholar GHK Cu is a regenerative peptide studied for its role in collagen support, tissue repair and inflammatory balance. As natural levels decline with age, interest in its broader biological impact continues to grow