Hair Growth Serum Intense with Copper Peptide GHK Cu Copper Peptide Serum AHK CU (1%) with Hyaluronic Acid (1.5%) When your hair feels stronger, you do too. The Hairgenetix Extra Strength Copper Peptide Serum, formulated with 10% GHK Cu and 5% AHK Cu, supports hair health at the root helping strengthen follicles, Hair Growth Serum Intense with Copper Peptide GHK Cu MOTS c Dosage Protocol: The 4 Injection Cycle, Reconstitution Guide, and the Exact Schedule We Use Perfect B