GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration Before you decide to begin using the copper peptide, GHK Cu, be aware it stings and leaves behind big, red welts that then leave a lovely bruise. In order to reap the 'glow' GHK Cu is a copper peptide known for supporting skin repair, collagen production, and overall tissue healing., Traditionally, its taken as an injection but that can come with irritation, bruising, or Bruising After Pinning Peptide TikTok Amazon.com : Vigority Arnica Bruise Cream: Extra Strength Arnica Cream for Bruises, Mature & Thin Skin with Helichrysum, Vitamins K, C & E Soothes, Restores & Strengthens Skin Barrier for Adult