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The potential role of this peptide in wound healing and tissue regeneration was demonstrated in a study which showed that because of the increased level of GHK-Cu in the plasma of younger adults compared to older adults, livers from older patients transplanted into younger patients began to function in the same way as younger liver tissue

While extensively studied in preclinical and small clinical settings, GHK-Cu lacks FDA approval as a pharmaceutical agent and is primarily available in cosmetic formulations for topical use

Adv Gerontol 2022;12:1438

Romieu I, Palazuelos E, Hernandez Avila M, Rios C, Muoz I, Jimenez C, Cahero G (1994) Sources of lead exposure in Mexico City