AHK Cu vs GHK Cu Difference Between GHK Cu and AHK Cu 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, 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 Vial BioHack London BioHack London