Injectable Peptides for Anti Aging? A Dermatologist Explains GHK Cu 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 Wholesale GHK Cu Copper Peptide Powder 99% Pure Anti Wrinkle Cosmetic Raw Material for Skin Care Products GHK Cu Copper Peptide Nordic Labs UK 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