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GHK-Cu (Glycyl-L-Histidyl-L-Lysine Copper Complex) is a naturally occurring copper-binding peptide found in human plasma, saliva, and tissues

Walsh, D., Mathews, M

- Used to possibly delay the signs of aging

Ebeid HM, Aboamer AA, Elella AAA, Khattab IM, Matloup OH, Hadhoud FI