GHK Cu for Hair Loss: Evidence, Safety, and UK Treatment Options Bolt Pharmacy 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 The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Parents & teen athletes: not everything trending on social media is safe., Copper peptides like GHK Cu are being promoted for skin health, but these products are unregulated and not FDA approved,