Hair Growth Serum Intense with Copper Peptide GHK Cu Your skin heals better when your barrier is strong. Topical GHK Cu peptide helps support that process GHK Cu Copper Peptide Serum 1% Black Tie Health 2 weeks in on GHK Cu and the glow is REAL., Brighter complexion, More even skin tone, Less breakouts, Softer fine lines, Thicker, fuller hair, This is just the beginning. Consistency is Copper Peptide (GHK Cu) 2% Recovery Serum