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[3] Chang CH, Tsai WC, Hsu YH, Pang JH

Studies show BPC-157 increases growth hormone receptor expression by 2.29-fold, ranking it among the top genes affected by the peptide

That is a mechanistically attractive claim, and the pathway itself is unquestionably central to hair biology but the strength of the direct evidence tying GHK-Cu specifically to Wnt activation in human follicles is weaker than the confident phrasing online implies, and much of it is filtered through commercial rather than primary literature

It is that you activate receptors on different neuronal populations that independently regulate appetite, metabolism, and energy balance