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Furthermore, treatment with recombinant IGF-1 enhanced erythroid colony formation in in vitro culture of bone marrow cells.126 In the same way, end-stage CKD patients undergoing hemodialysis and presenting erythrocytosis showed elevated serum IGF-1 levels, while EPO levels were variable

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Mechanistically, CK modulates the tricarboxylic acid (TCA) cycle through the PI3K-AKT pathway and inflammation-related MAPK/NF-B signaling, suggesting its therapeutic potential (Liu et al., 2025)

Stimulating Growth Hormone Secretion There's some evidence that GHK - Cu might have a hand in stimulating the secretion of growth hormone

For researchers interested in growth hormone releasing peptides, understanding how they compare to other testosterone-supporting peptides and ipamorelin (another growth hormone secretagogue) provides useful context

For healthcare founders, the risk is no longer theoretical