How does this Patch work and what are the benefits of Copper Peptide GHK CU? Proprietary form of phototherapy Patented Nanocrystal Technology Reflects light to activate Non Transdermal 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 Peptide Benefits (And a Few Risks) Explained Neurogan GHK Cu (Copper Peptide) Neck & Face Serum Global Ubuy