By age 30, your skin produces about 25% less collagen. By 40, that number can reach 40%. This decline affects more than just how your skin looks. It changes how it heals, Effects of Copper Tripeptide on the Growth and Expression of Growth Factors by Normal and Irradiated Fibroblasts Jeffrey D. Pollard, Susan Quan, Thomas Kang, R. James Koch, 2005 Revitalize Your Skin: The Benefits of Copper Peptide for Youthful Glow Copper Tripeptide 1 (GHK Cu): The Premier Anti Aging Ingredient for Skincare Formulators Titan Biotech Ltd. Lets talk GHK Cu , GHK Cu is a naturally occurring copper peptide that supports:, Collagen production, Tissue repair, Skin rejuvenation, Reducing Inflammation , Healthy aging, As levels