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The second common mix-up is timing

Another study (PMID: 40716276) explored injectable hydroxyapatite microsphere fillers loaded with GHK-Cu, extending applications into regenerative medicine research

For GHK-Cu specifically, the logic is sound even without direct evidence: cumulative copper exposure is lower with reduced frequency, and the gene expression changes initiated during loading persist during maintenance

Clamp AR, Schffski P, Valle JW, Wilson RH, Marreaud S, Govaerts AS et al (2008) A phase I and pharmacokinetic study of OSI-7904L, a liposomal thymidylate synthase inhibitor in combination with oxaliplatin in patients with advanced colorectal cancer