5 things that might surprise you about GHK Cu 1 Your body already makes it. GHK Cu is a naturally occurring copper peptide found in plasma, saliva, and urinebut levels decline as we age. 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 Peptide Therapy for Pain Management and Healing Core Medical & Wellness GHK Cu is a powerful copper peptide that supports collagen production, skin and hair health, and tissue repair. It may help reduce fine lines, improve elasticity, and promote faster healing. Want to learn