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The majority of the studies (see above in red) are preclinical studies in rodents, the vast majority of which have been done by a single research group in Croatia, which has been rinsing and repeating the same approach for decades

Oral peptide supplements offer a less invasive alternative for individuals seeking to incorporate peptides into their recovery regimen

Liver glutathione and glutathione reductase response of endotoxin-studied mice [PMID: 234913] Laboratory literature summary: Liver glutathione and glutathione reductase response of endotoxin-studied mice

A 1993 paper describes an experiment in which rats were implanted with wound chamber models that were subsequently treated with either GHK-Cu or a saline placebo

BioMed Res Int 2020:112 Ackler S, Mitten MJ, Foster K, Oleksijew A, Refici M, Tahir SK, Xiao Y, Tse C, Frost DJ et al (2010) The Bcl-2 inhibitor ABT-263 enhances the response of multiple chemotherapeutic regimens in hematologic tumors in vivo