1% GHK CU solution: is this applied directly on skin or diluted further? : r DIYaesthetics Copper Tripeptide 1 (GHK Cu): The Premier Anti Aging Ingredient for Skincare Formulators Titan Biotech Ltd. When a product says copper peptides it's worth checking the ingredient list. Copper peptides (like **Copper Tripeptide 1 GHK Cu**) are signaling ingredients that can support collagen processes in the skin. But not GHK Cu 13.0018.00 Peptune Labs Copper Tripeptide 1 (GHK Cu) 99% Powder Manufacturer BSTBIO Copper Tripeptide 1 GHK Cu 1% Solution