GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? GHK Cu for hair loss. Does it actually work? Let the science answer. Hair loss happens when follicles miniaturize, inflammation attacks them, blood supply weakens, and stem cells go dormant. GHK Cu addresses several Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience GHK Cu 10 g (10% Concentrate, 100,000 ppm) Lrak Technologies More than hair its cellular support , GHK CU is a well studied copper peptide known for its role in supporting:, Healthier looking hair & scalp environment, Hair that appears thicker, AHK Cu (Copper Tripeptide 3) Ingredient Guide Nubeean Noosa