The Benefits & Risks of GHK Cu (WATCH BEFORE TAKING) Ghk Cu Side Effects Metallic Taste Most people think they need to take copper peptides. But Your body already produces its own copper peptide called GHK Cu. But levels naturally decline with age. So Instead of trying to replace Amazon.com: 99% GHK Cu Copper Peptide Powder CAS 49557 75 7 7g pack : Beauty & Personal Care 7% GHK CU ACCELERANT Platinum Skin Care GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health