Copper Tripeptide 1 (GHK Cu): The Premier Anti Aging Ingredient for Skincare Formulators Titan Biotech Ltd. GHK Cu is a naturally occurring tripeptide in human plasma. Levels average 200 ng ml at age 20 and drop to 80 ng ml by age 60 (Pickart et al., 2020). That decline tracks with GHK Cu, the copper peptide, supports skin regeneration by signaling repair pathways and boosting collagen production. The result: stronger, healthier skin over time. #GHKCu #CopperPeptide #SkinRegeneration #RegenerativeAesthetics #Shookra Copper Peptide Serum GHK Cu + Argireline + Matrixyl 3000