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J Transl Med 22 , 998 (2024)

The copper ion itself serves as a cofactor for lysyl oxidase, the enzyme responsible for collagen and elastin cross-linking, meaning GHK-Cu both stimulates production of new structural proteins and ensures they are properly stabilized

He did advise subcutaneous b12 injections

A typical therapeutic course for severe deficiency is daily or weekly injections until blood levels normalize, then monthly maintenance shots
