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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

Indications of higher iron levels consist of the expression levels of TFR1 and its ligand iron-loaded TF is upregulated in glioblastoma CSCs compared to non-CSCs (David et al., 2015)

GSH administration was associated with shorter OS and DFS in breast cancer patients, with a median survival of 68 months in the GSH group, compared to 74 months in the Non-GSH group ( P = 0.023)

Cellular Penetration Lipo-GSH mechanism : Upon contact with cell membranes, liposomes deliver GSH into cells via adsorption, endocytosis, or membrane fusion