GHK-Cu — the copper peptide
• A tripeptide: glycine–histidine–lysine
• Binds copper (Cu²⁺) tightly
• Occurs naturally in human plasma; levels decline with age
• Studied mainly in skin: stimulates collagen synthesis in fibroblasts and is linked to wound-healing pathways
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Source:
• Pickart L, Margolina A. "Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data." International Journal of Molecular Sciences, 2018.