GHK Cu Face Serum 1200MG Lab Tested & High Potency Neurogan Health GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health Male Hair Restoration Before & After with PRF and GHK Cu What are the potential adverse effects of using GHK Cu (Glycyl Histidyl Lysine Copper) topical peptides for wound healing? GHK Cu peptide is the ultimate tool of biohacking your skin. Injectable GHK Cu peptide works as a repair signal inside your skin. And when the skin functions better, the visible effects follow: Reduced