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Oral route of vitamin B12 administration: In the case of vitamin B12 malabsorption, irrespective of the cause of malabsorption, the intramuscular route is preferred
A small injection, barely noticeable
For example, a 10% increase in lactic acid concentration in the intestines of rats following intestinal injection of metformin (Bailey et al., 1992)
While sulfur burps are generally a benign if unpleasant side effect, certain circumstances warrant prompt medical evaluation
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