GHK Cu Focal Point Vitality GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Jumbo Size The Secret Your Skin Already Knows GHK Cu is not a random combination of letters. It is a naturally occurring copper peptide that helps your skin do what it already knows how Before and after begins with consistency. Our 10% GHK Cu formula is engineered for deep absorption to support scalp health and visible density.