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[3] Additional in-vitro studies suggest that GHK-Cu may down-regulate transforming growth factor-1, a cytokine implicated in premature follicle regression, thereby potentially prolonging the anagen (growth) phase
It binds copper(II) with high affinity, and the copper complex not the bare peptide is the biologically active species
IGF1-LR3, thanks to its long half-life, is highly effective in counteracting myostatin and appears to work by activating a muscle protein called MyoD [1], [2]
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