For skin, hair, and healing, the answer looks promising enough that GHK-Cu has stayed relevant for decades instead of disappearing like most peptide trends do
Clean the injection site with an alcohol pad using a circular motion from center outward
2) This study completed by researchers Cangul et al aimed to evaluate the clinical and histopathological effects of topically applied the tripeptide-copper complex (TCC), GHK-Cu, as well as zinc oxide on open-wound healing in rabbits
PubMed ID: 3169264 Pickart L & Margolina A (2018) Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of New Gene Data PMC6073405 Gorouhi F & Maibach H (2009) GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration PMC4508379 / PubMed ID: 26236730 Finkley MB et al
Based on the published literature on Nrf2, the rise of Nrf2 protein levels is likely due to impaired degradation of the Nrf2 protein, rather than an induction of its transcription or translation