Marla BSN, RN Do you get injection site reactions from your GHK CU? 3 tips to make it better Room temp Use a different injection site Inject Instagram 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 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 Glow Peptide Injection: Revolutionizing Skin Rejuvenation Hubmed GHK Copper Peptide GHK Cu Tripeptide 1