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doi: Jzwiak M, Bauer M, Kamysz W, Kleczkowska P
Plasma GHK-Cu concentrations decline with age, from approximately 200 ng/mL at age 20 to under 80 ng/mL by age 60, correlating with reduced skin repair capacity
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Holistic Peptide Regimens: Integrative and functional medicine practitioners sometimes add GHK-Cu to broader wellness regimens
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