GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B For a GHKCu (coppercomplexed glycylhistidyllysine) solution prepared at 1 mg mL, how many insulinsyringe units (1 unit = 0.01 mL) should be drawn for a specific dose? GHK Cu peptide is the ultimate tool of biohacking your skin. Injectable GHK Cu peptide works as a repair signal inside your skin. And when the skin functions better, the visible effects follow: Reduced GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health Peptide Dosing Guide