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You might also have fewer cells in your stomach necessary to absorb B12 if youve had gastrointestinal or weight loss surgery
Read more about who vitamin B12 supplements may help
Summary Vitamin B12 injections can be an effective way of treating a deficiency
Read more about food sources of vitamin B12
This accounts for the people in the research that found 98% of their injected vitamin B12 in their urine 48 hours after it was administered
These can include whether you have an underlying health condition
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