GHK Cu Peptide Therapy Brea, CA Orange County GHK Cu Topical Cream GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? Uses and Benefits #ghk GHK Cu is a naturally occurring peptide in human plasma that declines with age. When used in injections (usually subcutaneous), it can offer various benefits: Skin Rejuvenation and Anti Aging: