If you think you have a more severe deficiency, its best to see a doctor to get a better idea of the specific supplements your body needs.
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How it relates to adjacent compounds GHK-Cu is the compound AHK-Cu is an analogue of, differing only by a methyl group at the first residue, and it carries a far larger published literature
Prescription and compounding: legitimate clinical use involves a provider, a prescription, and compounding through a licensed pharmacy
Common applications include the reconstitution of compatible research materials, laboratory dilution workflows, formulation studies, stability investigations, and general laboratory preparation procedures where a preserved aqueous medium is required