Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz Copper Peptide (GHK Cu) 2% Recovery Serum GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Glow powered by science. , Our GHK Cu Blue Copper Peptide Serum helps firm, repair, and revive tired skin for a smoother, more youthful look. , Lightweight, potent, and designed to support visible GHK CU Copper Peptide, Hair & Scalp Serum, 2 oz (60 ml)