GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu is one of the most powerful regenerative peptides for skin, hair, and overall tissue health. GHK Cu supports collagen production, healing, and visible rejuvenation from within. It's commonly used to improve skin GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health Copper Peptide Regenerating Serum for Glowing Skin and Hair