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When assessing for vitamin B12 deficiency, in addition to checking a vitamin B12 level, consider ordering a methylmalonic acid level or a holotranscobalamin level and CBC (to assess for red blood cell size)
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B12 Metabolism for Improved Nutrient Absorption B12 is crucial for proper digestion and absorption of nutrients, ensuring your body gets the most from the food you eat
doi: 10.1152/jn.00207.2001
