can anyone have b12 injections Vitamin Injections: What You Need To Know B12 Injections | Vitamin B12

There may be one caveat, though

There's limited evidence that doses above 600mcg provide additional benefit

They can include: abdominal pain anxiety confusion coughing rash slurred speech facial swelling trouble breathing weak pulse wheezing difficulty swallowing itchy skin swelling in your mouth and throat nausea shock Your body is in constant contact with foreign substances, and it produces antibodies to defend itself from these substances

Every batch undergoes analytical verification to help ensure consistency, identity, and reproducibility across laboratory applications

Very high doses of B12 taken orally may occasionally cause mild gastrointestinal disturbance in some individuals, though this is uncommon