Copper Peptide Firming Serum: Elasticity & Age Defying Dermaesthetics Beverly Hills GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health 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), Glow from within GHK Cu is one of the most powerful regenerative peptides for skin, hair, and total tissue health Think: boosted collagen, enhanced healing, and real, visible rejuvenation over time.