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The Best Way to Test for Vitamin B12 Deficiency A diagnosis of B12 deficiency should not be dismissed based solely on a single measurement of B12 levels in the blood
Oral high-dose B12 (1,000-2,000 g daily) may be considered as an alternative for patients with dietary deficiency without malabsorption who prefer this route or cannot tolerate injections
Cyanocobalamin injections are often prescribed to gastric bypass patients who have had part of their small intestine bypassed, making it difficult for B 12 to be acquired via food or vitamins
One of the primary reasons patients may require Vitamin B12 injections is pernicious anemiaa condition where the body cannot absorb enough B12 through the digestive tract
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