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Assessing Neurological Symptoms: A deficiency in vitamin B12 can lead to neurological symptoms, including numbness, tingling in the extremities, difficulty walking, and cognitive impairment

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Deficiency In healthy adults, overt vitamin B 12 deficiency is uncommon, mainly because total body stores can exceed 2,500 g, daily turnover is slow, and dietary intake of only 2.4 g/day is sufficient to maintain adequate vitamin B 12 status (see The RDA) (4)