According to a direct collagen production study, GHK-Cu outperformed retinoic acid by showing measurable collagen improvement in 70% of participants compared to 40% for the retinoid
The Src-Caveolin-1-eNOS pathway produces nitric oxide for vasodilation and improved blood flow
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Volume is a coarse readout, since it can rise from new synapses, small blood vessels, the birth of new neurons, which the adult brain does appear to make, or shifts in glia and fluid
There is no validated human dose for any application