What is GHK Cu Cream? GHK Cu is a topical peptide cream featuring copper peptides that support your skin's natural repair process. Backed by science, this ingredient offers a range of skin enhancing benefits: Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum GHK Cu Peptide Therapy Connecticut Skin Rejuvenation Benefits 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK