This compound has been studied for over 50 years. Most people discovered it last year on social media. In 1973, Dr. Loren Pickart identified GHK Cu while studying why young blood could GHK Cu Copper Peptide: The Ultimate Peptide For Longevity Blog Renew Vitality Copper peptide questions we get asked all the time How often should you use it? Do you need to avoid the sun? If you're new, start once daily (evenings are great), GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. Westend Medical Supply