Generalized Anaphylactic shock and death have been reported with administration of parenteral vitamin B12 (see WARNINGS)
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Regional Disciplinary Medical Board: vitamin B12 cannot be overdosed In 2009, the Regional Disciplinary Medical Board in Eindhoven stated very clearly that an overdose is not possible: There can be no question of an overdose of hydroxocobalamin, as the excess is excreted in urine by the kidneys and therefore cannot accumulate in the body
J Clin Endocrinol Metab, 96(1), 150158
The most common side effects are mild and include injection site reactions (redness, slight swelling, or tenderness), mild headaches during the initial days of use, and occasional dizziness or lightheadedness
Antioxidant Activity: Provides direct antioxidant protection and supports the body's own antioxidant systems