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A lack of B12 can lead to anemia (not having enough red blood cells), which causes you to feel tired and weak
Monthly 1,000 mcg Maintenance Protocol Once the deficiency is fixed, a monthly maintenance protocol of 1,000 mcg injections is suggested
It can also result in pernicious anemia which occurs when your body does not have enough vitamin B12 to produce the required amount of red blood cells
Oral vitamin B12 replacement: an effective treatment for vitamin B12 deficiency after total gastrectomy in gastric cancer patients
These groups are often at higher risk for B12 deficiency
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