GHK Cu Copper Peptide Injections: Advanced Skin Rejuvenation Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule 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: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration