Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit 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 hard spots at injection site : r Peptides GHKCu Copper Peptide Therapy Skin & Healing Regeneration GHK Cu Peptides: Unlocking the Copper Peptide Revolution in Skin Care Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application ScienceDirect