Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3 Dr. Brenner Labs GHK CU Cream 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 Youthful Skin, Healthy Cells, Vibrant You. 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper