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Taking B12 with food, switching to a different formulation, or trying a liquid preparation may reduce nausea
Factors to Consider Gauge: A gauge is a measurement of a needle's diameter or thickness
StatPearls notes that high-dose oral B has been shown effective for maintenance, but recommendations are to always use the parenteral route in severe neurological manifestations
Other people who are at risk of having vitamin B12 deficiency include those who have had intestinal surgery, or who have gut diseases like Crohns disease or celiac disease
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