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Gastrointestinal absorption of vitamin B12 depends on the presence of sufficient intrinsic factor and calcium ions
Spotting one or more of these could mean your Vitamin B12 levels are low, and its time to take action
The one thing not to do is stop or change a prescribed course suddenly on your own, especially where the cause is non-dietary and the treatment is lifelong
B vitamins are water-soluble, so excess amounts are typically flushed out of the body through urine, minimizing the risk of toxicity
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