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Your average B12 injection uses a concentrated serum of the vitamin to boost the energy and metabolism of those seeking the treatment
Fortunately, there is increasing evidence that oral B12 supplements are just as good as injections for raising blood levels in most people ( Vegetarians and vegans are usually advised to take at least 10 mcg per day, or at least 2,000 mcg once per week ( However, some doctors still prefer the use of injections
Vitamin B12 deficiency can also result from poor nutrition, cancer, HIV, during pregnancy, old age, due to alcoholism
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