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Serious adverse effects have not been widely reported, but long-term safety data in humans is lacking

. Doctors may not be prescribing oral vitamin B12 formulations because they may be unaware of this option or have concerns regarding its effectiveness Objectives: To assess the effects of oral vitamin B 12 versus intramuscular vitamin B 12 for vitamin B 12 deficiency. Selection criteria: Randomized controlled trials (RCTs) comparing the effect of oral versus IM vitamin B 12 for vitamin B 12 deficiency

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Table 3: Vitamin B 12 Medication Table The table below is not an exhaustive list of all vitamin B 12 products and therapeutic considerations

Never stop your diabetic medication without a physicians advice