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The body produces thousands of them naturally, and they act as signaling molecules: telling cells to grow, repair, release hormones, or regulate inflammation
Peptides , 7(6), 11651187
Copper(II) facilitates GHKs interaction with cell surface receptors and intracellular signaling cascades, including TGF- and integrin pathways, which in turn regulate fibroblast activity and keratinocyte differentiation
Most protocols use morning dosing, partly because of the cognitive enhancement intent (effects during waking hours) and partly because some users report mild stimulant-like effects that interfere with sleep if dosed too late
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