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 GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health Just started GHK Cu? Heres what to expect, This isnt an overnight peptide, it builds, Weeks 12:, You may start noticing small shiftsskin feels a bit smoother, nails a little stronger, Weeks 34:, Just started GHK Cu? Here's what to expect This isn't an overnight peptide, it builds Weeks 12: You may start noticing small shiftsskin feels a bit smoother, nails a little stronger Weeks 34: