Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application ScienceDirect GHK Cu Focal Point Vitality GHK CU (Copper Peptide Serum) NovaNAD+ GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? 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