Can I receive Sculptra (polyLlactic acid) injections while being treated with GHKCu (copper peptide) injections? How Often to Inject GHK Cu PeptidesExplorer 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 Injectable GHK Cu: Beginner's Guide to Copper Peptide