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Research proposes several mechanisms: direct and copper-chelating inhibition of tyrosinase (the rate-limiting melanin enzyme), a shift from darker eumelanin toward lighter pheomelanin production, and antioxidant dampening of UV-driven melanogenesis

GHK-Cu is administered via subcutaneous injection for optimal absorption and systemic effect

[DOI] [PubMed] [Google Scholar] 101.Ayaz A., Houle E., Pilsner J.R

A 2011 study by Ilic and colleagues in Life Sciences reported that BPC-157 at 10 g/kg or 10 ng/kg i.p

In one magazine interview, Jennifer Aniston reportedly shared that she used copper peptide injections to support her skin and hair