What is GHK Cu? LIVV A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend 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 Skin Perfection Copper Peptide Serum GHK CU 1% for Jordan Ubuy Microlift Renewal Cream with GHKCu in Chicago Copper Peptide Collagen Cream at Better Med Spa Real people. Real results. No hype. We didn't ask Stephanie to do anything special. No ring light, no filter, no professional photos. Just her bathroom mirror and 3 weeks of consistency.