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Peer-Reviewed References Enebo LB, et al

Precautions: Individuals with a copper allergy (rare but real) should avoid GHK-Cu

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rotate injection sites regularly for site hygiene and comfort Lyophilized peptide: Store frozen in a dry, dark environment

Diffuse hyperpigmentation and gingival darkening were reported and reportedly recurred after re-exposure

After this initial injection, I recommend 0.5 cc injections of this B12 formulation three times a week for about three to four months, at which point I retest CBC and homocysteine