Injectable preparations are not
Copper itself is an essential cofactor for numerous enzymes involved in collagen synthesis (lysyl oxidase), antioxidant defense (superoxide dismutase) and melanin production (tyrosinase)
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GHK-Cu peptide is a copper-binding peptide complex formed from GHK, a tripeptide made from glycine, histidine, and lysine, and copper ions 1, 9
[ [PMID: 29515968]
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