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While you might already take oral supplements, these injections allow the vitamin to enter your bloodstream immediately
This includes individuals with medical conditions such as pernicious anemia, atrophic gastritis, celiac disease, or Crohns disease, all of which can interfere with B12 absorption
The target range is 2-8 degrees Celsius (36-46 degrees Fahrenheit)
High levels could mean a pernicious anemia diagnosis
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