GHK Cu Peptide: What It Does for Body Composition and Metabolic Health 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 How Often to Inject GHK Cu PeptidesExplorer Amazon.com: GHK Cu Copper Peptide Supplement, Anti Aging & Hair Growth Support, Improves Skin Elasticity & Firmness, Thicker, Fuller Hair, Easy Absorption, Precisely Dosed, 90 Vegan Capsules : Health & Household