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GHK-Cu increases its production by up to 70%

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[Google Scholar] Reed TT, Owen J, Pierce WM, Sebastian A, Sullivan PG, Butterfield DA (2009) Proteomic identification of nitrated brain proteins in traumatic brain-injured rats treated postinjury with gammaglutamylcysteine ethyl ester: insights into the role of elevation of glutathione as a potential therapeutic strategy for traumatic brain injury

Unlike many other peptides, Semax uniquely stimulates the brains production of neurotrophins, which play a crucial role in neuron growth and maintenance, setting it apart as a comprehensive cognitive enhancer