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Description
The most common side effect of B12 injections is irritation at the injection site, and injections are typically administered intramuscularly or subcutaneously. Less common side effects may include headache, nausea, diarrhea, itching, or a brief feeling of lightheadedness after the injection

All GHK-Cu vials are third-party tested by independent ISO-certified laboratories

10.1002/ptr.1720 678

[DOI] [PMC free article] [PubMed] [Google Scholar] 162.Couto J.P., Moreira R

Caplan AID, Correa
