What Are The Similarities And Differences Between AHK CU And GHK Cu? Knowledge Advanced GHK CU + AHK CU Peptide Hair Growth Serum 30ml Azur Skin What Is The Difference Between AHK CU And GHK Cu Blog Sonwu GHK and AHK copper peptide topical serum tutorial This gives a roughly 3% concentration of both peptides. Great for any hair + skin protocol Comment and let me know if you Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference