PDF) Effects of GHK Cu on MMP and TIMP Expression, Collagen and Elastin Production, and Facial Wrinkle Parameters GHK Cu Glow Peptide Stack for Skin Rejuvenation Jennifer R. Berman MD The naturally occurring peptide GHK reverses age related fibrosis by modulating myofibroblast function He Aging Pathobiology and Therapeutics Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule GHK Cu in the NAD+ Push Patch: A Smarter Way to Stimulate Collagen, He Hi, Finch