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 vial dosage question : r PeptidePathways GHK Cu Peptide: Benefits for Tissue Repair, Healing, and Recovery Revolution Health & Wellness Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents