A broader review of the peptides relationship to the nitric oxide system describes its competing interactions with both L-arginine and L-arginine analogues across a range of experimental models [2]
However, as reassuring as all of this is, there are a couple of things to remain mindful of: Copper toxicity Because GHK-Cu contains copper, it does pose a potential risk of copper toxicity,12 the symptoms of which include abdominal pain, vomiting, chest pain, chills, cough, fever, general weakness, anemia, burning sensations, tremors, and a metallic taste in the mouth.13 The risk is small, as the concentrations of copper in the peptide are typically well within safe parameters, but its good to be aware of it
Drug metabolism and disposition: the biological fate of chemicals 38 , 16791687, doi: 10.1124/dmd.110.034678 (2010)
these convert nonproteolytic K63-linked chains into proteasomal degradation signals
Other Possible Uses New studies are being done to see if GHK-Cu can also be used to treat anxiety and improve pain tolerance as well as reducing aggression
You dont get a B12 shot