Product Question] Most effective way to deliver GHK Cu (Copper Tripeptide 1) through skin? : 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: Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit 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 The tripeptide GHKCu complex ameliorates lipopolysaccharideinduced acute lung injury in mice Oncotarget