2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care Seraphime A few years ago, barely anyone was talking about copper peptides now GHK Cu and AHK Cu are everywhere in skincare, biohacking, and longevity conversations. But did you know there are copper peptides Neurogan Health Introduces AHK CU + GHK CU Hair Serum Pro Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum AHK Cu Peptide, Hair Elixir 4800mg