A daily intake of approximately 6 μg vitamin B-12 appears to saturate all the vitamin B-12–related variables in Danish postmenopausal women%

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High Prevalence of Cobalamin Deficiency in Elderly Outpatients

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Cobalamin and Folate Evaluation: Measurement of Methylmalonic Acid and Homocysteine vs Vitamin B12 and Folate

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Upper Gastrointestinal pH in Seventy-Nine Healthy, Elderly, North American Men and Women

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