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[DOI] [PMC free article] [PubMed] [Google Scholar] 8.Zheng Z, Zong Y, Ma Y, et al

There's no one-size-fits-all stack

Chemical penetration enhancers including propylene glycol, dimethyl sulfoxide (DMSO), and various terpenes increase GHK-Cu skin penetration by 2-4 fold, though potential irritation risks require careful optimization

c-Myc phosphorylation is required for cellular response to oxidative stress
