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: The Blue Revolution: Why 1% Pure GHK Cu is the New Standard for Mature Pure & Cimple GHK Cu Skin Cream Proven Collagen & Anti Aging, $279 GHK CU Crepey Skin Escape Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference