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Made of the amino acids glycine, glutamic acid, and cysteine, it's a part of many essential bodily processes, like tissue building and repair, and immune system function

These publications help frame GHK-Cu as a biologically active copper-binding peptide rather than as an established treatment for every claimed use

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In lab and skin model studies, GHK-Cu shifts how fibroblasts behave, and fibroblasts are the cells that produce much of the collagen and elastin that keep skin firm