GHK Cu is more than a skincare trend its a copper peptide involved in repair, regeneration, and cellular signaling., This peptide has been studied for its connection to collagen production, skin GHK Cu 50mg vs 100mg: Which Concentration Should You Buy? GHK CU 50mg Buy high quality GHK Cu 50mg (copper peptide) from the UK's leading store Pure Peptides UK 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