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Less commonly, vitamin B12 deficiency results from an inadequate intake of foods that contain vitamin B12
Vitamin B12 also plays a critical role in red blood cell production
Oral administration of high-dose vitamin B 12 (1 to 2 mg daily) is as effective as intramuscular administration for correcting anemia and neurologic symptoms
"Reversal of epigenetic aging and immunosenescent trends in humans"
Several points deserve emphasis
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