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The cost and availability of auto-antibodies testing, such as intrinsic factor and anti-parietal cell antibodies, can be a barrier to further investigation for vitamin B12 deficiency to exclude pernicious anemia
[11] Long-term metformin therapy reduces calcium-dependent intrinsic-factor binding, lowering B12 absorption and potentially necessitating higher or more frequent parenteral doses
What happens if your B12 is too high
A simple blood test can tell us exactly what your Vitamin B12 levels are
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