The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK CU 50 mg LIVV GHK Cu Copper Peptide Collagen, Skin Rejuvenation & Hair Restoration GHK Cu for Skin Rejuvenation WeCare Pharmacy Ever heard of GHK Cu peptide? It's a naturally occurring copper peptide that helps repair tissue, stimulate collagen, and support skin healing. When used in injectable form, it works at a deeper level