ghk-cu regulates 4000 genes The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Does GHK-Cu Really Work? 40

But the same agency is explicit that NAMs are not wholesale replacements

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Most notably, the peptide has been tested for its effects on brain activity and mental fatigue: Brain activity: A study probed into Semax's influence on the brain's Default Mode Network (DMN) in 24 middle-aged individuals, using a 1% Semax solution or placebo

Comparison to other compound dosing For context, the dosing requirements of 5-amino-1mq differ significantly from traditional peptides

But here's a question worth asking: do copper peptides actually need to be injected to work