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: Copper Peptides For Skin: Benefits & Side Effects Minimalist GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B GHK Cu Peptide: What It Does for Body Composition and Metabolic Health Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. Westend Medical Supply Electrophoretic deposition of GHK Cu loaded MSN chitosan coatings with pH responsive release of copper and its bioactivity ScienceDirect