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How to Safely Administer B12 Shots at Home Self-administering B12 injections at home requires proper training, technique, and adherence to safety protocols

In addition, people with gastrointestinal issues that prevent absorption of nutrients from the gut can develop vitamin B12 deficiency symptoms

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[112] Furthermore, this assay requires overnight incubation and may give false results if any inactive vitamin B 12 analogues are present in the foods

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More serious side effects that require urgent or emergency medical help may include allergic reactions, acute kidney injury, and inflammation of the gallbladder