GHK Cu is a copper peptide used in regenerative medicine to support collagen production, tissue repair, and cellular renewal throughout the body. It's for individuals looking to improve skin firmness, brightness, and visible Anti Aging] "Combining GHK Cu with red light has seen a 70% increase in collagen and a 230% increase in fibroblasts." Study with foundations out of MIT & Harvard. At a dose only required GHK Cu, commonly known as copper peptides, are found naturally within the human body where they play a vital role in skin repair and maintenance. Copper peptides support optimal skin function by helping GHK Cu G Lab Peptides Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000