Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum GHK Cu Peptide: What It Does for Body Composition and Metabolic Health Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Peptides and Wellness Medications Copper Peptide (GHK Cu): Clinical Uses, Stability & Compounding Tips And we're back with our GHK Cu peptide injection pen. Here's how to use it, and where. More coming soon ;) #ghkcu #ghkcucopperpeptide #peptides