GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has Amazon.com: Neurogan GHK Cu (Copper Peptide) Neck & Face Serum 1,200mcg (1 oz bottle) : Beauty & Personal Care Ghk cu Copper Peptide Repair Serum Firming, Collagen Boost, Skin Renewal, Anti aging Face Serum Etsy Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix GHK Cu Skincare Products SumaNurica GHK Cu Peptide Therapy for Radiant Skin by Desert Mobile