GHK CU Peptide for Skin Rejuvenation Wittmer Rejuvenation Clinic 2 weeks in on GHK Cu and the glow is REAL. Brighter complexion More even skin tone Less breakouts Softer fine lines Thicker, fuller hair This is just PSA] Finally, a Dr. explains the mechanism behind the "copper uglies" : r SkincareAddiction 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: GHK Cu Copper Peptide Skin & Healing Beverly Hills