GHK Cu: The Science Behind the Copper Peptide Transforming Skin Repair and Regeneration Meto blog Perhaps the most commonly asked about question when it comes to GHK Cu is THE BURN. Let's learn! @summitrejuvenation If your GHK Cu or MOTS C injection leaves welts and burns like a hornet, it's usually not the peptide it's the technique. A few small tweaks can turn a sting into almost GHKCu Copper Peptide Therapy Skin & Healing Regeneration