GHK Cu vs AnagenX: Which Peptide Approach Supports Hair Growth Best? 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 a growing body of peer Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience Copper Peptide Hair Growth Mechanism: What Kinds of Hair Loss Can It Improve? Perfect Medical Peptide Labz Copper Peptide Hair Growth Serum, 10% GHK cu, 5% AHK cu, Rejuvenates Follicles Walmart.com