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Is there a difference between GHK and GHK-Cu

Science 372 , 12241229 (2021)

From the nervous system: central nervous system overexcitation, anxiety, headache, loss of consciousness, sleep disturbances, confusion, coma

Collectively, the results of this study illustrate that AOD9604 exerts distinct metabolic effects depending on the genetic background of the animal and the presence of functional 3-ARs
