GHK Cu (copper peptide) is one of the most talked about wellness peptidesand for good reason This naturally occurring peptide has been studied for its potential to support skin quality, hair health, and Amazon.com: GHK Cu Copper Peptide Supplement, Anti Aging & Hair Growth Support, Improves Skin Elasticity & Firmness, Thicker, Fuller Hair, Easy Absorption, Precisely Dosed, 90 Vegan Capsules : Health & Household 50mg GHK Cu Vial Blue Copper Peptide Face Serum Age Aging Moisturizing Repairing for Skin Care Serum Facial Care Kit d GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B 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