Oral Liposomal Copper GHK Liposomal GHK Cu Supplement GHK Cu is a small copper bound peptide (glycyl histidyl lysine with a copper ion) found naturally in human tissues and fluids. Its levels decline with age, and it plays a role in tissue repair, regeneration, GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? 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?