Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit Neurogan Health, copper peptide GHK CU, 120 mcg, 60 tablets iHerb GHK Cu 100 mg High Purity Copper Peptide Proliven Labs GHK Cu 50mg Biobond Peptides If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection