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According to the National Institute of Health, the Food and Nutrition Board (FNB) didnt establish an upper limit for vitamin B12 because of its low risk of side effects
While very high oral doses (1,000 to 2,000 mcg) can achieve some passive absorption without intrinsic factor roughly 1% of the dose is absorbed passively many clinicians prefer the reliability and rapid correction offered by injections in this population
[1] Particular concerns with multi-dose vials include dosing errors (confusion between mg, mL, or units) and contamination from repeated access
Our experienced practitioners tailor all dosing recommendations based on individual patient demographics and comorbidities to ensure optimal results and safety
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