So excited about this peptide! GHK Cu serum and scalp solution available Fascinating peptide that helps to prevent and reduce fine lines and wrinkles. Applied topically on the scalp for hair growth. GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? Copper Peptide Hair Growth Serum (10% GHK Cu + 5% AHK Cu) 30ml ROBYN'S TACK ROOM Private Label Organic Professional Treatment Hair Loss Copper Peptide Hair Growth Serum10% Ghk Cu Hair Growth Serum Youve heard of GHK Cu., We didnt stop there., Our formula pairs GHK Cu with its bigger, more targeted brother AHK Cu., GHK Cu helps support follicle health and strand strength., AHK Cu has been