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Some people may also suffer from pernicious anemia, which inhibits the body from being able to absorb enough vitamin B12, causing a deficiency

If you notice signs of anaphylaxisswelling of your tongue, face, or throat, difficulty breathing, or difficulty swallowingafter getting a B12 injection, call 911 or head to the closest emergency room immediately

B12 Injections for Fat Loss: What the Experts Say While B12 is not a magic fat-burning solution, it can enhance your overall energy and improve how your body metabolizes food, especially when combined with a balanced diet and regular exercise

However, there are a few rare cases where this treatment is not recommended