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Polycythaemia Vera: Treatment with B12 can mask the diagnosis of this blood disorder, so careful monitoring is necessary if B12 is started before a complete diagnosis
The two most common forms of vitamin B12 youll encounter are cyanocobalamin and methylcobalamin
Individuals with a Deficiency: Certain people face a higher risk of low B12 levels
Going beyond 500mcg rarely provides additional benefit and may increase the likelihood of mild side effects like headaches or injection site reactions
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