And we're back with our GHK Cu peptide injection pen. Here's how to use it, and where. More coming soon ;) #ghkcu #ghkcucopperpeptide #peptides GHK Cu DrBrainRX Copper Peptides GHK Cu Fluid 15ml 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