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10.1046/j.1471-4159.2001.00008.x [DOI] [PubMed] [Google Scholar] Skaper S

Giorgini, F., Guidetti, P., Nguyen, Q., Bennett, S.C

These conditions typically include hypertension, cancer, and diabetes

One reason topical GHK-Cu efficacy varies so much between users is that the peptide struggles to penetrate intact skin

This would place essential metals such as zinc, copper, and iron at risk for deficiency during a course of chelation
