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Gastrointestinal issues: If youve been diagnosed with gastrointestinal disorders such as celiac disease or Crohns disease, or youve undergone gastrointestinal surgery, you may require B12 injections
B12 is also important for carbohydrate metabolism
It is used to treat low levels of vitamin B12 in your body
Only after 90 days will all the pre-existing red blood cells have expired, and be replaced by healthy ones
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