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 Blue Skies Health & Wellness Clinic How Copper Peptides Boost Hair Growth And Stop Hair Loss PLEIJ Salon + Spa GHK Cu Peptide: Benefits, Dosing & Anti Aging Effects Understanding Evidence Quality How Hair Loss Companies Cheat Clinical Trials Perfect Hair Health